Document:

ex_10-49.htm

    

      EXHIBIT
10.49

      Exhibit
A

      to
UCC Financing Statement

      

      Debtor:  AVISTAR
COMMUNICATIONS CORPORATION

      Secured
Party:  JPMORGAN CHASE BANK, N.A.

      Collateral
Description:

       

      All of
the Debtor’s right, title and interest in, to and under the following, whether
now existing or hereafter acquired or arising (the “Collateral”):

       

      (a) accounts
(including health-care-insurance receivables), chattel paper, deposit accounts,
documents (including negotiable documents), equipment, general intangibles,
goods (including fixtures), instruments (including promissory notes), inventory
(including all goods held for sale or lease or to be furnished under a contract
of service, and including returns and repossessions), investment property
(including securities and securities entitlements), letter of credit rights,
money, and all of Debtor’s books and records with respect to any of the
foregoing, and the computers and equipment containing said books and
records;

      

      (b) all
claims, demands, causes and choses in action in respect of any of the foregoing
and all accessions and additions thereto; and

      

      (c) any and
all cash and non-cash proceeds and products of any of the foregoing, including
without limitation, any and all proceeds of any insurance, indemnity,
instruments, warranty or guaranty payable to such Debtor from time to time with
respect to the Collateral and any and all other amounts from time to time paid
or payable under or in connection with any of the Collateral.

      

      Notwithstanding
the foregoing, the Collateral shall not include (w) any of the outstanding
capital stock of any subsidiary of the Grantor that is a Controlled Foreign
Corporation (as defined in the Internal Revenue Code of 1986, as
amended,  in excess of 65% of the voting power of all classes of
capital Stock of such Controlled Foreign Corporation entitled to vote or (x) any
restricted money market accounts maintained by the Grantor with Comerica Bank –
California to the extent the same secures the Grantor’s obligations with respect
to the letter of credit in the amount of $145,200 issued by such bank to Clemons
Properties Partners L.P. or (y) the Debtor’s right to receive royalties or
other funds or assets under that certain Patent License Agreement dated
July 17, 2006, as amended, by the Debtor and Sony Computer Entertainment,
Inc., as amended, modified, supplemented or extended from time to time, or
as any provision thereof may be waived, and any patent license agreement
executed by Debtor and Sony Computer Entertainment, Inc. in substitution or
replacement therefor, and the Debtor’s rights to enforce payment or delivery of
such royalties or other funds or assets or (z) any “Excluded Patent Collateral”
(as defined below).

      
        
           

        

        
          1

          
            

          

        

        
           

        

      

      “Excluded
Patent Collateral” shall mean:

      

      (a) the
following patents and patent applications (the “Patents”):

       

      
        
          	
                  Patent
      or Application No.

                	
                  Country

                	
                  Filing
      Date

                	
                  Title
      of Patent and First Named Inventor

                
	
                  5689641

                	
                  US

                	
                  10/01/1993

                	
                  Multimedia
      collaboration system arrangement for routing compressed AV signal through
      a participant site without decompressing the AV signal Ludwig, Lester
      F.

                
	
                  5867654

                	
                  US

                	
                  6/7/1996

                	
                  Two
      monitor videoconferencing hardware Ludwig, Lester F.

                
	
                  5978835

                	
                  US

                	
                  6/7/1996

                	
                  Multimedia
      mail, conference recording and documents in video conferencing Ludwig,
      Lester F.

                
	
                  5896500

                	
                  US

                	
                  6/7/1996

                	
                  System
      for call request which results in first and second call handle defining
      call state consisting of active or hold for its respective AV device
      Ludwig, Lester F.

                
	
                  5884039

                	
                  US

                	
                  6/7/1996

                	
                  System
      for providing a directory of AV devices and capabilities and call
      processing such that each participant participates to the extent of
      capabilities available Ludwig, Lester F.

                
	
                  5617539

                	
                  US

                	
                  6/7/1996

                	
                  Multimedia
      collaboration system with separate data network and A/V network controlled
      by information transmitting on the data network Ludwig, Lester
      F.

                
	
                  5802294

                	
                  US

                	
                  6/7/1996

                	
                  Teleconferencing
      system in which first location video mosaic generator sends combined local
      participants images to second location video mosaic generator for
      displaying combined images Ludwig, Lester F.

                
	
                  5758079

                	
                  US

                	
                  6/7/1996

                	
                  Call
      control in video conferencing allowing acceptance and identification of
      participants in a new incoming call during an active teleconference
      Ludwig, Lester F.

                
	
                  5854893

                	
                  US

                	
                  6/10/1996

                	
                  System
      for teleconferencing in which collaboration types and participants by
      names or icons are selected by a participant of the teleconference Ludwig,
      Lester F.

                
	
                  5915091

                	
                  US

                	
                  6/11/1996

                	
                  Synchronization
      in video conferencing Ludwig, Lester F.

                
	
                  6351762

                	
                  US

                	
                  6/7/1996

                	
                  Method
      and system for log-in­based video and multimedia calls Ludwig, Lester
      F.

                
	
                  6583806

                	
                  US

                	
                  4/7/1997

                	
                  Videoconferencing
      hardware Ludwig, Lester F.

                
	
                  6343314

                	
                  US

                	
                  4/28/1997

                	
                  Remote
      participant hold and disconnect during videoconferencing Ludwig, Lester
      F.

                
	
                  6237025

                	
                  US

                	
                  12/19/199
      7

                	
                  Multimedia
      collaboration system Ludwig, Lester
F.

                

        

        
          
             

          

          
            2

            
              

            

          

          
             

          

        

        	
                Patent
      or Application No.

              	
                Country

              	
                Filing
      Date

              	
                Title
      of Patent and First Named Inventor

              

        
          	
                  6212547

                	
                  US

                	
                  5/5/1998

                	
                  UTP
      based video and data conferencing Ludwig, Lester F.

                
	
                  6898620

                	
                  US

                	
                  5/5/1998

                	
                  Multiplexing
      video and control signals onto UTP Ludwig, Lester F.

                
	
                  6437818

                	
                  US

                	
                  5/5/1998

                	
                  Video
      conferencing on existing UTP infrastructure Ludwig, Lester
    F.

                
	
                  6426769

                	
                  US

                	
                  5/5/1998

                	
                  High-quality
      switched analog video communications over unshielded twisted pair Ludwig,
      Lester F.

                
	
                  09/565677

                	
                  US

                	
                  5/4/2000

                	
                  Scalable
      Networked Multimedia System And Applications Ludwig, Lester
    F.

                
	
                  7185054

                	
                  US

                	
                  11/1/2000

                	
                  Participant
      display and selection in video conference calls Ludwig, Lester
      F.

                
	
                  6594688

                	
                  US

                	
                  06/11/2001

                	
                  Dedicated
      echo canceler for a workstation Ludwig, Lester F.

                
	
                  7054904

                	
                  US

                	
                  4/9/2002

                	
                  Marking
      and searching capabilities in multimedia documents within multimedia
      collaboration networks Ludwig, Lester F.

                
	
                  6789105

                	
                  US

                	
                  4/9/2002

                	
                  Multiple-editor
      authoring of multimedia documents including real-time video and
      time-insensitive media Ludwig, Lester F.

                
	
                  6959322

                	
                  US

                	
                  3/4/2003

                	
                  UTP
      based video conferencing Ludwig, Lester F.

                
	
                  10/382554

                	
                  US

                	
                  3/4/2003

                	
                  Teleconferencing
      employing multiplexing of video and data conferencing signals J. Chris
      Lauwers

                
	
                  7206809

                	
                  US

                	
                  11/26/200
      3

                	
                  Method
      for real-time communication between plural users Ludwig, Lester
      F.

                
	
                  7152093

                	
                  US

                	
                  11/26/2003

                	
                  System
      for real-time communication between plural users Ludwig, Lester
      F.

                
	
                  7421470

                	
                  US

                	
                  11/26/200
      3

                	
                  Method
      for real-time communication between plural users Ludwig, Lester
      F.

                
	
                  7433921

                	
                  US

                	
                  11/26/200
      3

                	
                  System
      for real-time communication between plural users Ludwig, Lester
      F.

                
	
                  11/264926

                	
                  US

                	
                  11/1/2005

                	
                  Audio
      communications using devices with different capabilities Lester F.
      Ludwig

                
	
                  11/264936

                	
                  US

                	
                  11/1/2005

                	
                  Log-in
      based communications plus two data types Lester F.
  Ludwig

                
	
                  11/265059

                	
                  US

                	
                  11/1/2005

                	
                  Using
      login-based addressing to communicate with listed users Lester F.
      Ludwig

                
	
                  11/265256

                	
                  US

                	
                  11/1/2005

                	
                  Registration
      based addressing over multiple networks with digital audio communication
      Lester F. Ludwig

                
	
                  11/265394

                	
                  US

                	
                  11/1/2005

                	
                  Registration
      based addressing and call handles to establish communication Lester F.
      Ludwig

                

        

        
          
             

          

          
            3

            
              

            

          

          
             

          

        

        	
                Patent
      or Application No.

              	
                Country

              	
                Filing
      Date

              	
                Title
      of Patent and First Named Inventor

              

        
          	
                  7487210

                	
                  US

                	
                  1/12/2007

                	
                  Method
      for managing real-time communications Ludwig, Lester F.

                
	
                  7412482

                	
                  US

                	
                  1/12/2007

                	
                  System
      for managing real-time communications Ludwig, Lester F.

                
	
                  7437411

                	
                  US

                	
                  1/15/2007

                	
                  Communication
      of a selected type over a wide area network Ludwig, Lester
    F.

                
	
                  7398296

                	
                  US

                	
                  1/16/2007

                	
                  Networked
      audio communication over two networks Ludwig, Lester F.

                
	
                  7444373

                	
                  US

                	
                  1/16/2007

                	
                  Wireless
      real-time communication Ludwig, Lester F.

                
	
                  7441001

                	
                  US

                	
                  1/18/2007

                	
                  Real-time
      wide-area communications between ports Ludwig, Lester
F.

                
	
                  7437412

                	
                  US

                	
                  1/19/2007

                	
                  Real-time
      communication of a selected type Ludwig, Lester F.

                
	
                  11/668625

                	
                  US

                	
                  1/30/2007

                	
                  Storing
      and accessing media files J. Chris Lauwers

                
	
                  11/669003

                	
                  US

                	
                  1/30/2007

                	
                  Storage
      and playback of media files J. Chris Lauwers

                
	
                  11/737723

                	
                  US

                	
                  4/19/2007

                	
                  Storing
      and accessing media files Lester F. Ludwig

                
	
                  90/009008

                	
                  US

                	
                  02/25/2008

                	
                  UTP
      based video and data conferencing Ludwig, Lester F.

                
	
                  90/009015

                	
                  US

                	
                  02/29/2008

                	
                  Video
      conferencing on existing UTP infrastructure Ludwig, Lester
    F.

                
	
                  90/009016

                	
                  US

                	
                  02/29/2008

                	
                  System
      for providing a directory of AV devices and capabilities and call
      processing such that each participant participates to the extent of
      capabilities available Ludwig, Lester F.

                
	
                  90/009020

                	
                  US

                	
                  05/20/2008

                	
                  Multimedia
      collaboration system with separate data network and a/v network controlled
      by information transmitting on the data network Ludwig, Lester
      F.

                
	
                  90/009021

                	
                  US

                	
                  02/29/2008

                	
                  System
      for real-time communication between plural users Ludwig, Lester
      F.

                
	
                  90/009031

                	
                  US

                	
                  03/05/2008

                	
                  Remote
      participant hold and disconnect during videoconferencing Ludwig, Lester
      F.

                
	
                  CA2173204

                	
                  CA

                	
                  03/16/1994

                	
                  Multimedia
      collaboration system Ludwig, Lester F.

                
	
                  CA2173209

                	
                  CA

                	
                  10/03/1994

                	
                  Multimedia
      collaboration system Ludwig, Lester F.

                
	
                  CA2204442

                	
                  CA

                	
                  03/16/1994

                	
                  Multimedia
      collaboration system with separate data network and a/v network controlled
      by information transmitting on the data network Ludwig, Lester
      F.

                

        

        
          
             

          

          
            4

            
              

            

          

          
             

          

        

        	
                Patent
      or Application No.

              	
                Country

              	
                Filing
      Date

              	
                Title
      of Patent and First Named Inventor

              

        
          	
                  CA2296181

                	
                  CA

                	
                  10/03/1994

                	
                  System
      for providing a directory of av devices and capabilities and call
      processing such that each participant participates to the extent of
      capabilities available Ludwig, Lester F.

                
	
                  CA2296182

                	
                  CA

                	
                  10/03/1994

                	
                  Call
      control in video conferencing allowing acceptance and identification of
      participants in a new incoming call during an active teleconference
      Ludwig, Lester F.

                
	
                  CA2296185

                	
                  CA

                	
                  10/03/1994

                	
                  System
      for call request which results in first and second call handle defining
      call state consisting of active or hold for its respective av device
      Ludwig, Lester F.

                
	
                  CA2296187

                	
                  CA

                	
                  10/03/1994

                	
                  Synchronization
      in video conferencing Ludwig, Lester F.

                
	
                  CA2296189

                	
                  CA

                	
                  10/03/1994

                	
                  System
      for teleconferencing in which collaboration types and participants by
      names or icons are selected by a participant of the teleconference Ludwig,
      Lester F.

                
	
                  CA2297940

                	
                  CA

                	
                  03/16/1994

                	
                  Two
      monitor videoconferencing hardware Ludwig, Lester F.

                
	
                  CH690154

                	
                  CH

                	
                  09/28/1994

                	
                  Synchronization
      in video conferencing Ludwig, Lester F.

                
	
                  DE69426456.3

                	
                  DE

                	
                  10/03/1994

                	
                  Videoconference
      signal switching without decompression Ludwig, Lester
F.

                
	
                  DE69428725.3

                	
                  DE

                	
                  03/16/1994

                	
                  Multimedia
      teleconferencing system Ludwig, Lester F.

                
	
                  DE69429684.8

                	
                  DE

                	
                  10/03/1994

                	
                  Synchronization
      in a multimedia system Ludwig, Lester F.

                
	
                  DE69430272.4

                	
                  DE

                	
                  10/03/1994

                	
                  Participant
      location in multimedia collaboration system Ludwig, Lester
    F.

                
	
                  DE69431525.7

                	
                  DE

                	
                  03/16/1994

                	
                  Multimedia
      collaboration system Ludwig, Lester F.

                
	
                  DE69431536.2

                	
                  DE

                	
                  03/16/1994

                	
                  Multimedia
      collaboration system Ludwig, Lester F.

                
	
                  DE69432803.0

                	
                  DE

                	
                  10/03/1994

                	
                  Call
      detection and handling in multimedia collaboration system Ludwig, Lester
      F.

                
	
                  DE69433042.6

                	
                  DE

                	
                  10/03/1994

                	
                  Multimedia
      mail in teleconferencing system Ludwig, Lester F.

                
	
                  DE69434762.0

                	
                  DE

                	
                  10/03/1994

                	
                  Call
      detection and handling in multimedia collaboration system Ludwig, Lester
      F.

                
	
                  DE69435132.6

                	
                  DE

                	
                  10/03/1994

                	
                  Call
      detection and handling in multimedia collaboration system Ludwig, Lester
      F.

                
	
                  FR1307038

                	
                  FR

                	
                  10/03/1994

                	
                  Call
      detection and handling in multimedia collaboration system Ludwig, Lester
      F.

                
	
                  FR1705913

                	
                  FR

                	
                  10/03/1994

                	
                  Call
      detection and handling in multimedia collaboration system Ludwig, Lester
      F.

                

        

        
          
             

          

          
            5

            
              

            

          

          
             

          

        

        	
                Patent
      or Application No.

              	
                Country

              	
                Filing
      Date

              	
                Title
      of Patent and First Named Inventor

              

        
          	
                  FR0721725

                	
                  FR

                	
                  03/16/1994

                	
                  Multimedia
      collaboration system Ludwig, Lester F.

                
	
                  FR0721726

                	
                  FR

                	
                  10/03/1994

                	
                  Videoconference
      signal switching without decompression Ludwig, Lester
F.

                
	
                  FR0899952

                	
                  FR

                	
                  10/03/1994

                	
                  Call
      detection and handling in multimedia collaboration system Ludwig, Lester
      F.

                
	
                  FR0899953

                	
                  FR

                	
                  10/03/1994

                	
                  Participant
      location in multimedia collaboration system Ludwig, Lester
    F.

                
	
                  FR0899954

                	
                  FR

                	
                  10/03/1994

                	
                  Multimedia
      mail in teleconferencing system Ludwig, Lester F.

                
	
                  FR0898424

                	
                  FR

                	
                  03/16/1994

                	
                  Multimedia
      teleconferencing system Ludwig, Lester F.

                
	
                  FR0912055

                	
                  FR

                	
                  03/16/1994

                	
                  Multimedia
      collaboration system Ludwig, Lester F.

                
	
                  FR0912056

                	
                  FR

                	
                  10/03/1994

                	
                  Synchronization
      in a multimedia system Ludwig, Lester F.

                
	
                  GB1307038

                	
                  GB

                	
                  10/03/1994

                	
                  Call
      detection and handling in multimedia collaboration system Ludwig, Lester
      F.

                
	
                  GB1705913

                	
                  GB

                	
                  10/03/1994

                	
                  Call
      detection and handling in multimedia collaboration system Ludwig, Lester
      F.

                
	
                  GB2282506

                	
                  GB

                	
                  05/27/1994

                	
                  Teleconferencing
      system Ludwig, Lester F.

                
	
                  GB0721725

                	
                  GB

                	
                  03/16/1994

                	
                  Multimedia
      collaboration system Ludwig, Lester F.

                
	
                  GB0721726

                	
                  GB

                	
                  10/03/1994

                	
                  Videoconference
      signal switching without decompression Ludwig, Lester
F.

                
	
                  GB2319135

                	
                  GB

                	
                  05/27/1994

                	
                  Teleconferencing
      system Ludwig, Lester F.

                
	
                  GB2319136

                	
                  GB

                	
                  05/27/1994

                	
                  Teleconferencing
      system Ludwig, Lester F.

                
	
                  GB2319137

                	
                  GB

                	
                  05/27/1994

                	
                  Teleconferencing
      system Ludwig, Lester F.

                
	
                  GB2319138

                	
                  GB

                	
                  05/27/1994

                	
                  Teleconferencing
      system Ludwig, Lester F.

                
	
                  GB0899952

                	
                  GB

                	
                  10/03/1994

                	
                  Call
      detection and handling in multimedia collaboration system Ludwig, Lester
      F.

                
	
                  GB0899953

                	
                  GB

                	
                  10/03/1994

                	
                  Participant
      location in multimedia collaboration system Ludwig, Lester
    F.

                
	
                  GB0899954

                	
                  GB

                	
                  10/03/1994

                	
                  Multimedia
      mail in teleconferencing system Ludwig, Lester F.

                
	
                  GB0898424

                	
                  GB

                	
                  03/16/1994

                	
                  Multimedia
      teleconferencing system Ludwig, Lester F.

                
	
                  GB0912055

                	
                  GB

                	
                  03/16/1994

                	
                  Multimedia
      collaboration system Ludwig, Lester
F.

                

        

        
          
             

          

          
            6

            
              

            

          

          
             

          

        

        	
                Patent
      or Application No.

              	
                Country

              	
                Filing
      Date

              	
                Title
      of Patent and First Named Inventor

              

        
          	
                  GB0912056

                	
                  GB

                	
                  10/03/1994

                	
                  Synchronization
      in a multimedia system Ludwig, Lester F.

                
	
                  NL1705913

                	
                  NL

                	
                  10/03/1994

                	
                  Call
      detection and handling in multimedia collaboration system Ludwig, Lester
      F.

                
	
                  SE1705913

                	
                  SE

                	
                  10/03/1994

                	
                  Call
      detection and handling in multimedia collaboration system Ludwig, Lester
      F.

                
	
                  5751338

                	
                  US

                	
                  12/30/1994

                	
                  Methods
      and systems for multimedia communications via public telephone networks
      Ludwig, Jr., Lester Frank

                
	
                  6081291

                	
                  US

                	
                  04/16/1997

                	
                  Methods
      and systems for multimedia communication via public telephone networks
      Ludwig, Jr., Lester Frank

                
	
                  6972786

                	
                  US

                	
                  12/23/1999

                	
                  Multimedia
      services using central office Ludwig, Lester F.

                
	
                  11/786802

                	
                  US

                	
                  4/11/2007

                	
                  Multimedia
      services using central office Ludwig, Lester F.

                
	
                  11/927459

                	
                  US

                	
                  10/29/2007

                	
                  Interconnecting
      network locations between premises network and central office using
      ethernet on loop plant Ludwig, Lester F.

                
	
                  90/009079

                	
                  US

                	
                  03/14/2008

                	
                  Multimedia
      services using central office Ludwig, Lester F.

                
	
                  CA2208987

                	
                  CA

                	
                  10/04/1995

                	
                  Multimedia
      communications via public telephone networks Ludwig, Jr., Lester
      Frank

                
	
                  GB2296620

                	
                  GB

                	
                  10/11/1995

                	
                  Methods
      and systems for multimedia communication via public telephone networks
      Ludwig, Jr., Lester Frank

                
	
                  GB0801858

                	
                  GB

                	
                  10/04/1995

                	
                  Multimedia
      central office and method of providing a plurality of multimedia
      telecommunication services Ludwig, Jr., Lester Frank

                
	
                  GB2308526

                	
                  GB

                	
                  10/11/1995

                	
                  Methods
      and systems for multimedia communication via public telephone networks
      Ludwig, Jr., Lester Frank

                
	
                  SG53410

                	
                  SG

                	
                  10/04/1995

                	
                  Multimedia
      communications via public telephone networks Ludwig, Jr., Lester
      Frank

                
	
                  6816904

                	
                  US

                	
                  5/4/2000

                	
                  Networked
      video multimedia storage server environment Ludwig,
  Lester

                
	
                  10/931651

                	
                  US

                	
                  8/31/2004

                	
                  Scalable
      networked multimedia system and applications Ludwig,
  Lester

                
	
                  CA2308147

                	
                  CA

                	
                  11/04/1998

                	
                  Scalable
      networked multimedia system and applications Ludwig,
  Lester

                
	
                  DE69837887.3

                	
                  DE

                	
                  11/04/1998

                	
                  Scalable
      networked multimedia system and applications Ludwig,
  Lester

                
	
                  DE69840427

                	
                  DE

                	
                  11/04/1998

                	
                  Scalable
      networked multimedia system and applications Ludwig,
  Lester

                
	
                  FR1814290

                	
                  ES
      FR

                	
                  11/04/1998

                	
                  Scalable
      networked multimedia system and applications Ludwig,
  Lester

                

        

        
          
             

          

          
            7

            
              

            

          

          
             

          

        

        	
                Patent
      or Application No.

              	
                Country

              	
                Filing
      Date

              	
                Title
      of Patent and First Named Inventor

              

        
          	
                  FR1029273

                	
                  FR

                	
                  11/04/1998

                	
                  Scalable
      networked multimedia system and applications Ludwig,
  Lester

                
	
                  GB1814290

                	
                  GB

                	
                  11/04/1998

                	
                  Scalable
      networked multimedia system and applications Ludwig,
  Lester

                
	
                  GB1029273

                	
                  GB

                	
                  11/04/1998

                	
                  Scalable
      networked multimedia system and applications Ludwig,
  Lester

                
	
                  IE1814290

                	
                  IE

                	
                  11/04/1998

                	
                  Scalable
      networked multimedia system and applications Ludwig,
  Lester

                
	
                  11/246867

                	
                  US

                	
                  10/7/2005

                	
                  Multiple-channel
      codec and transcoder environment for gateway, mcu, broadcast and video
      storage applications J. Chris Lauwers

                
	
                  11/814671

                	
                  US

                	
                  1/12/2006

                	
                  Multiple-channel
      codec and transcoder environment for gateway, mcu, broadcast and video
      storage applications J. Chris Lauwers

                
	
                  EP06718435.8

                	
                  EP

                	
                  01/12/2006

                	
                  Multiple-channel
      codec and transcoder environment for gateway, mcu, broadcast and video
      storage applications J. Chris Lauwers

                
	
                  KR10-2007­-7019362

                	
                  KR

                	
                  01/12/2006

                	
                  Multiple-channel
      codec and transcoder environment for gateway, mcu, broadcast and video
      storage applications J. Chris Lauwers

                
	
                  SG200705449-7

                	
                  SG

                	
                  01/12/2006

                	
                  Multiple-channel
      codec and transcoder environment for gateway, mcu, broadcast and video
      storage applications J. Chris Lauwers

                
	
                  EP942737.8

                	
                  EP

                	
                  6/9/2000

                	
                  System
      And Method For Broswer-Based Multimedia Collaboration Reporting Burnett,
      Gerald, et al.

                
	
                  10/018,441

                	
                  US

                	
                  6/9/2000

                	
                  System
      And Method For Broswer-Based Multimedia Collaboration Reporting Burnett,
      Gerald, et al.

                
	
                  11/625330

                	
                  US

                	
                  1/21/2007

                	
                  Storing
      and accessing media files J. Chris Lauwers

                
	
                  90/009009

                	
                  US

                	
                  02/26/2008

                	
                  Method
      for real-time communication between plural users Ludwig, Lester
      F.

                
	
                  90/009010

                	
                  US

                	
                  02/25/2008

                	
                  Method
      and system for log-in­based video and multimedia calls Ludwig, Lester
      F.

                
	
                  90/009012

                	
                  US

                	
                  02/22/2008

                	
                  Participant
      display and selection in video conference calls Ludwig, Lester
      F.

                
	
                  90/009013

                	
                  US

                	
                  02/25/2008

                	
                  Multimedia
      collaboration system Ludwig, Lester F.

                
	
                  90/009018

                	
                  US

                	
                  03/03/2008

                	
                  Synchronization
      in video conferencing Ludwig, Lester F.

                
	
                  90/009019

                	
                  US

                	
                  02/28/2008

                	
                  System
      for call request which results in first and second call handle defining
      call state consisting of active or hold for its respective av device
      Ludwig, Lester F.

                
	
                  90/009023

                	
                  US

                	
                  02/27/2008

                	
                  Multiple-editor
      authoring of multimedia documents including real-time video and
      time-insensitive media Ludwig, Lester
F.

                

        

        
          
             

          

          
            8

            
              

            

          

          
             

          

        

        	
                Patent
      or Application No.

              	
                Country

              	
                Filing
      Date

              	
                Title
      of Patent and First Named Inventor

              

        
          	
                  90/009024

                	
                  US

                	
                  02/27/2008

                	
                  Multimedia
      mail, conference recording and documents in video conferencing Ludwig,
      Lester F.

                
	
                  90/009025

                	
                  US

                	
                  03/03/2008

                	
                  Call
      control in video conferencing allowing acceptance and identification of
      participants in a new incoming call during an active teleconference
      Ludwig, Lester F.

                
	
                  90/009030

                	
                  US

                	
                  03/04/2008

                	
                  UTP
      based video conferencing Ludwig, Lester F.

                
	
                  90/009032

                	
                  US

                	
                  03/05/2008

                	
                  Two
      monitor videoconferencing hardware Ludwig, Lester F.

                
	
                  90/009035

                	
                  US

                	
                  03/06/2008

                	
                  High-quality
      switched analog video communications over unshielded twisted pair Ludwig,
      Lester F.

                
	
                  90/009038

                	
                  US

                	
                  03/07/2008

                	
                  Multiplexing
      video and control signals onto UTP Ludwig, Lester F.

                
	
                  90/009040

                	
                  US

                	
                  03/05/2008

                	
                  Teleconferencing
      system in which location video mosaic generator sends combined local
      participants images to second location video mosaic generator for
      displaying combined images Ludwig, Lester F.

                
	
                  90/009042

                	
                  US

                	
                  03/07/2008

                	
                  Dedicated
      echo canceler for a workstation Ludwig, Lester F.

                
	
                  90/009044

                	
                  US

                	
                  03/14/2008

                	
                  Multimedia
      collaboration system arrangement for routing compressed av signal through
      a participant site without decompressing the av signal Ludwig, Lester
      F.

                
	
                  90/009077

                	
                  US

                	
                  09/13/2008

                	
                  Videoconferencing
      hardware Ludwig, Lester F.

                
	
                  90/009081

                	
                  US

                	
                  03/14/2008

                	
                  Marking
      and searching capabilities in multimedia documents within multimedia
      collaboration networks Ludwig, Lester F.

                
	
                  CA2290701

                	
                  CA

                	
                  03/16/1994

                	
                  Multimedia
      collaboration system Ludwig, Lester F.

                
	
                  EP1307038

                	
                  EP

                	
                  10/03/1994

                	
                  Call
      detection and handling in multimedia collaboration system Ludwig, Lester
      F.

                
	
                  EP1705913

                	
                  EP

                	
                  10/03/1994

                	
                  Call
      detection and handling in multimedia collaboration system Ludwig, Lester
      F.

                
	
                  EP0721725

                	
                  EP

                	
                  03/16/1994

                	
                  Multimedia
      collaboration system Ludwig, Lester F.

                
	
                  EP0721726

                	
                  EP

                	
                  10/03/1994

                	
                  Videoconference
      signal switching without decompression Ludwig, Lester
F.

                
	
                  EP0899952

                	
                  EP

                	
                  10/03/1994

                	
                  Call
      detection and handling in multimedia collaboration system Ludwig, Lester
      F.

                
	
                  EP0899953

                	
                  EP

                	
                  10/03/1994

                	
                  Participant
      location in multimedia collaboration system Ludwig, Lester
    F.

                

        

        
          
             

          

          
            9

            
              

            

          

          
             

          

        

        	
                Patent
      or Application No.

              	
                Country

              	
                Filing
      Date

              	
                Title
      of Patent and First Named Inventor

              

        
          	
                  EP0899954

                	
                  EP

                	
                  10/03/1994

                	
                  Multimedia
      mail in teleconferencing system Ludwig, Lester F.

                
	
                  EP0898424

                	
                  EP

                	
                  03/16/1994

                	
                  Multimedia
      teleconferencing system Ludwig, Lester F.

                
	
                  EP0912055

                	
                  EP

                	
                  03/16/1994

                	
                  Multimedia
      collaboration system Ludwig, Lester F.

                
	
                  EP0912056

                	
                  EP

                	
                  10/03/1994

                	
                  Synchronization
      in a multimedia system Ludwig, Lester F.

                
	
                  EP99202661.7

                	
                  EP

                	
                  03/16/1994

                	
                  Teleconferencing
      system Ludwig, Lester F.

                
	
                  PCT/US94/00
      2961

                	
                  WO

                	
                  03/16/1994

                	
                  Multimedia
      collaboration system Ludwig, Lester F.

                
	
                  PCT/US94/01
      1193

                	
                  WO

                	
                  10/03/1994

                	
                  Multimedia
      collaboration system Ludwig, Lester F.

                
	
                  08/860575

                	
                  US

                	
                  10/04/1995

                	
                  Methods
      and systems for multimedia communications via public telephone networks
      Ludwig, Jr., Lester Frank

                
	
                  90/009080

                	
                  US

                	
                  03/14/2008

                	
                  Methods
      and systems for multimedia communication via public telephone networks
      Ludwig, Jr., Lester Frank

                
	
                  EP0801858

                	
                  EP

                	
                  10/04/1995

                	
                  Multimedia
      central office and method of providing a plurality of multimedia
      telecommunication services Ludwig, Jr., Lester Frank

                
	
                  PCT/US95/01
      3016

                	
                  WO

                	
                  10/04/1995

                	
                  Multimedia
      communications via public telephone networks Ludwig, Jr., Lester
      Frank

                
	
                  60/064266

                	
                  US

                	
                  11/04/1997

                	
                  Video
      storage server Ludwig, Lester

                
	
                  EP1814290

                	
                  EP

                	
                  11/04/1998

                	
                  Scalable
      networked multimedia system and applications Ludwig,
  Lester

                
	
                  EP1029273

                	
                  EP

                	
                  11/04/1998

                	
                  Scalable
      networked multimedia system and applications Ludwig,
  Lester

                
	
                  PCT/US98/02
      3596

                	
                  WO

                	
                  11/04/1998

                	
                  Scalable
      networked multimedia system and applications Ludwig,
  Lester

                
	
                  60/647168

                	
                  US

                	
                  1/25/2005

                	
                  Multiple-channel
      codec and transcoder environment for gateway, MCU, broadcast and video
      storage applications Lester Ludwig

                
	
                  PCT/US06/00
      1358

                	
                  WO

                	
                  01/12/2006

                	
                  Multiple-channel
      codec and transcoder environment for gateway, MCU, broadcast and video
      storage applications J. Chris Lauwers

                
	
                  EP03023333.2

                	
                  EP

                	
                  10/04/1995

                	
                  Multimedia
      communications via public telephone networks Ludwig, Jr., Lester
      Frank

                
	
                  08/869236

                	
                  US

                	
                  06/04/1997

                	 
      
	
                  08/900807

                	
                  US

                	
                  07/25/1997

                	 
      

        

        
          
             

          

          
            10

            
              

            

          

          
             

          

        

        	
                Patent
      or Application No.

              	
                Country

              	
                Filing
      Date

              	
                Title
      of Patent and First Named Inventor

              

        
          	
                  08/982849

                	
                  US

                	
                  12/02/1997

                	 
      
	
                  2,377,014

                	
                  CA

                	
                  12/07/01

                	
                  System
      and method for browser-based multimedia collaboration reporting Burnett,
      Gerald, et al.

                
	
                  PCT/US00/15
      990

                	
                  WO

                	
                  06/09/00

                	
                  System
      and method for browser-based multimedia collaboration reporting Burnett,
      Gerald, et al.

                
	
                  60/138,921

                	
                  US

                	
                  06/11/99

                	
                  System
      and method for browser-based multimedia collaboration reporting Burnett,
      Gerald

                
	
                  11/932,802

                	
                  US

                	
                  10/31/2007

                	
                  System
      and method for browser-based multimedia collaboration reporting Burnett,
      Gerald, et al.

                
	
                  90/009082

                	
                  US

                	
                  03/14/2008

                	
                  Methods
      and systems for multimedia communication via public telephone networks
      Ludwig, Jr., Lester Frank

                
	
                  90/009014

                	
                  US

                	
                  02/26/2008

                	
                  System
      for teleconferencing in which collaboration types and participants by
      names or icons are selected by a participant of the teleconference Ludwig,
      Lester F.

                
	
                  90/009022

                	
                  US

                	
                  02/29/2008

                	
                  Networked
      video multimedia storage server environment Ludwig,
  Lester

                
	
                  5689641

                	
                  US

                	
                  10/01/1993

                	
                  Multimedia
      collaboration system arrangement for routing compressed AV signal through
      a participant site without decompressing the AV signal Ludwig, Lester
      F.

                
	
                  5867654

                	
                  US

                	
                  6/7/1996

                	
                  Two
      monitor videoconferencing hardware Ludwig, Lester
  F.

                

        

      

      

      (b) all
patents and patent applications (i) to which any of the Patents directly or
indirectly claims priority, (ii) for which any of the Patents directly or
indirectly forms a basis for priority, and/or (iii) that directly or indirectly
incorporate by reference, or are directly or indirectly incorporated by
reference into, the Patents;

      

      (c) all
reissues, reexaminations, extensions, continuations, continuations in part,
continuing prosecution applications, requests for continuing examinations,
divisions, registrations of any item in any of the foregoing categories (a) and
(b);

      

      (d) all
non-United States patents, patent applications, and counterparts relating to the
Patents or any item in any of the foregoing categories (a) through (c),
including, without limitation, certificates of invention, utility models,
industrial design protection, design patent protection, other governmental
grants or issuances, and any rights to apply in any or all countries of the
world for patents, certificates of invention, utility models, industrial design
protections, design patent protections, or governmental grants or issuances of
any type related to any of the Patents and the inventions, invention
disclosures, and discoveries therein; inventions, invention disclosures, and
discoveries described in any of the Patents of any item in the foregoing
categories (a) though (d);

       

      (e) all
rights to apply in any or all countries of the world for patents, certificates
of invention, utility models, industrial design protections, design patent
protections, or other governmental grants or issuances of any type related to
any item in any of the foregoing categories (a) through (e), including, without
limitation, under the Paris Convention for the Protection of Industrial
Property, the International Patent Cooperation Treaty, or any other convention,
treaty, agreement, or understanding;

      

      (f) causes of
action (whether known or unknown or whether currently pending, filed, or
otherwise) and other enforcement rights under, or on account of, any of the
Patents and/or the rights described in the above subparagraphs (a) through (f)
(including, without limitation, all causes of action and other enforcement
rights for (i) damages, (ii) injunctive relief, and (iii) any other remedies of
any kind) for past, current and future infringement; and all
rights to collect royalties and other payments under or on account of any of the
Patents and/or any item in any of the foregoing categories (a) through
(g).

      
        
           

        

        
          11ex_10-50.htm

    EXHIBIT
10.50

    

    March 26,
2010

    

    Dr.
Gerald Burnett

    202
Camino Al Lago

    Atherton,
CA 94027

    

    

    Avistar
Communications Corporation

    1875
South Grant Street, 10th
Floor

    San
Mateo, CA 94112

    

    

    To Whom
It May Concern:

    

    If
needed, I, Dr. Gerald Burnett, will fund Avistar Communications Corporation
(“Avistar”) thru March 31, 2011, with the same mechanism and terms that
currently secures Avistar’s existing $5.0 million revolving line of credit that
terminates on December 21, 2010, up to a total dollar amount of $7.0
million.

    

    

    

    /s/ Gerald J.
Burnett                        

    Dr.
Gerald Burnett

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