Document:

Exhibit 10.5

                            PATENT PURCHASE AGREEMENT

This Patent Purchase  Agreement (the  Agreement),  dated May 21, 1990 is between
RMED  International,  Inc.  (the  Company),  a Colorado  corporation  and Brandy
Enterprises,  Ltd. (Brandy), an Illinois corporation.

      1. For a purchase price of $225,000 the Company is selling to Brandy a 50%
interest  in the  pending  "Flushable  Diaper  Device and  Method"  patent  (the
Patent). The purchase price will be payable as follows:

                    On March 26, 1990         $50,000
                    On April 6, 1990          $25,000
                    On April 30, 1990         $25,000
                    On May 10, 1990           $25,000
                    On June 10, 1990          $50,000
                    On July 10, 1990          $50,000

Failure to pay any amount of the above sums will  result in a  reduction  of the
percentage of ownership and a reduction of the royalty rates  discussed below by
the percentage of the unpaid amount of the original sum of $225,000.

      2. All rights to the use and  licensing of the patent  remain with Company
and  Brandy.  If the Company is  dissolved  or  liquidated  or if the Company is
declared  insolvent  or  bankrupt  or the Company  makes an  assignment  for the
benefit of creditors or a receiver is  appointed or any  proceeding  is demanded
under any  provision  of any  bankruptcy  laws,  the Company  and the  principal
officers of said Company  acknowledge  and agree that these rights for their 50%
interest shall revert to Brandy.

      3. The Company  will have the  exclusive  right to purchase  Brandy's  50%
interest in the Patent.  Brandy will give the Company  sixty (60) days notice of
their  intention to sell. If this share should be sold to a party other than the
Company,  they will have the same  rights  as set forth in  paragraph  2 of this
Agreement.

      4. The Company  will pay Brandy a royalty of 50% of the net  profits  from
the sale of diapers  made under  pending  "Flushable  Diaper  Device and Method"
patent.  Net profits are defined as gross sales of "Flushable  Diaper Device and
Method"  diapers  less the  following:  1) direct  costs  related  to such sales
including credit card fees,  sales returns and allowances,  and trade discounts;
2) costs to  manufacture  such  "Flushable  Diaper  Device and  Method"  diapers
including raw materials,  labor,  and packaging;  3) direct  distribution  costs
related to sales of "Flushable Diaper Device and Method" diapers including sales
commissions,   advertising  and  promotion;   4)  general  administrative  costs
allocated to sales of "Flushable  Diaper Device and Method" diapers based on the
percentage  of sales of "Flushable  Diaper  Device and Method"  diapers to total
sales of all  products of the  Company;  and 5) federal and state  income  taxes
allocated based on the same method used in number 4) above without giving effect
to income tax benefits relating to operating loss carryforwards generated

<PAGE>

in all tax years prior to fiscal 1991. Payments of royalties will be paid within
30 days after the end of each calendar quarter.

      5. Brandy has the option to exchange its  ownership  of the Diaper  Patent
for $225,000 of the Company's common or preferred stock based on the closing bid
price  of the  Company's  common  stock  on May  18,  1990.  At the  time of the
exchange, this Agreement will no longer be in effect and the Company will become
the sole owner of the Patent; however, if the Company is dissolved or liquidated
or if the Company is  declared  insolvent  or  bankrupt or the Company  makes an
assignment  for the  benefit of  creditors  or a receiver  is  appointed  or any
proceeding is demanded under any provision of any  bankruptcy  laws, the Company
and the principal officers of said Company acknowledge and agree to allow Brandy
to repurchase its 50% interest in the Patent for $1 and surrender such common or
preferred stock as exchanged previous.

      IN WITNESS  WHEREOF,  the parties  hereto have caused this Agreement to be
duly executed as of the day and year first above written.

                                    RMED International, Inc.

                                    By: /s/ Edward Reiss
                                        -------------------------
                                        Edward Reiss
                                        Chairman  and  President

                                    Brandy Enterprises, Ltd.

                                    By: /s/ Brenda Schenk
                                        -------------------------
                                        Brenda Schenk
                                        President10-Q Scientific Learning

	

FIRST
AMENDMENT to

LEASE dated
March 20, 2000

by and
between

ROTUNDA PARTNERS II, a
California limited liability company, as Landlord

and

SCIENTIFIC LEARNING
CORPORATION, a Delaware corporation, as Tenant

THIS FIRST AMENDMENT TO
LEASE is dated December 29, 2000 for reference purposes only, and is made by
and between ROTUNDA PARTNERS II, a California limited liability company
(“Landlord”) and SCIENTIFIC LEARNING CORPORATION, a Delaware
corporation (“Tenant”), to be effective and binding upon the parties
as of the date the last of the designated signatories to this First Amendment
shall have executed the Amendment. 

WHEREAS, Landlord
and Tenant have entered into the Lease dated March 20, 2000 (“the
“Original Lease”); and 

WHEREAS, it now
appears that the Delivery Date, as defined in the Lease, will be delayed beyond
the date originally contemplated. 

NOW, THEREFORE,
Landlord and Tenant hereby agree as follows: 

	1. 		Section
2.4 of the Original Lease is hereby amended to read in full as follows:

	 	     ”2.4
Delivery Of Possession. Landlord shall deliver to Tenant possession of the Leased
Premises upon Substantial Completion of the Improvements as that term is defined in the
Work Letter (defined in Section 2.5) attached hereto as Exhibit B. The date that the
Leased Premises are so delivered to the Tenant shall be deemed the “Delivery Date.” The
Intended Delivery Date is March 17, 2001, extended for such number of days as Landlord
may be delayed in delivering possession of the Leased Premises to Tenant by reason of the
action or inaction of Tenant. If Landlord is unable to so deliver possession of the
Leased Premises to Tenant in the agreed condition on or before the Intended Delivery
Date, then Tenant shall be entitled to receive a credit of two (2) days of free rent for
each day after the Intended Delivery Date that the Leased Premises are not so delivered
to Tenant, which free rent shall apply to the first months in which Base Monthly Rent is
due. In addition, if Landlord is unable to so deliver possession of the Leased Premises
to Tenant in the agreed condition on or before May 1, 2001 (extended for such number of
days as Landlord may be delayed in delivering possession of the Leased Premises to Tenant
by reason of the action or inaction of Tenant), Tenant shall have the right to terminate
this Lease. If Tenant terminates the Lease, Landlord shall not be liable in damages to
Tenant for any delay. If Tenant elects to receive the credit rather than electing to
terminate this lease, Tenant may not thereafter terminate this Lease based upon this
paragraph.

	2. 		In
Exhibit B to the Original Lease (the Work Letter), Section 1 is hereby amended to read in
full as follows:

	 	     “1.
Construction of Improvements in Original Build-out Space. Landlord shall retain Pankow
Special Projects Limited, or other contractor

	

1. 

	

	 	selected
by Tenant and approved by Landlord (which approval shall not be unreasonably withheld or
delayed) (“Landlord’s Contractor”) to furnish and install within the
Original Build-out Space, certain items of general construction (the “Improvements”)
as described by: (i) the plans prepared by Architectural Dimensions, Inc. (the “Landlord’s
Architect”) dated March 13, 2000 and attached and incorporated herein as Schedule 1
to the Work Letter, and approved by Hooks Design and Architecture (“Tenant’s
Architect”); (ii) the seven page untitled outline of Tenant’s requirements for
its build-out dated “March 15, 2000 Revised”, attached and incorporated herein
as Schedule 2 to the Work Letter; and (iii) Pankow Special Projects L.P.’s revised
preliminary budget estimate dated March 2, 2000, attached and incorporated herein as
Schedule 3 to the Work Letter. Landlord shall cause the Improvements to be completed by
March 16, 2001. The Landlord’s Architect and Tenant’s Architect are
collectively referred to as “Architects”.

	3. 		In
Exhibit B to the Original Lease (the Work Letter), Section 4 is hereby amended to read in
full as follows:

	 	“4.
Completion Date of Improvements. Landlord hereby agrees to construct the Base Building
Improvements in the Original Build-out Space and in the Expansion Space in accordance
with the Base Building Plans in good and workmanlike manner and in compliance with all
applicable laws and regulations, at Landlord’s sole cost and expense except as
expressly set forth in this Work Letter, and to complete the Improvements by March 16,
2001.”

	4.		In
addition to the Improvements and the Base Building Improvements, which Landlord is
required to construct and furnish at Landlord’s expense, Landlord and Tenant have
also agreed that Landlord shall retain Pankow Special Projects Limited to perform the
additional work on the Premises detailed on Exhibit 1 (which work is referred to as “Tenant-Borne
Improvements”). 

			Landlord has
agreed to initially pay the costs of the Tenant-Borne Improvements, provided that Tenant
shall repay Landlord for the actual costs incurred in making the Tenant-Borne
Improvements, which may not exceed $200,000 (the “Tenant-Borne Improvement Costs”),
in monthly installments over the first 18 months of the Lease Term. The amount of each
monthly installment shall be determined by amortizing the Tenant-Borne Improvement Costs
(together with simple interest at a rate of ten percent (10%)) over the 18 month period.
Each monthly installment shall be paid to Landlord as additional rent under section
3.2(e) of the Original Lease.

			Exhibit 1
may be amended hereafter by execution of a revised Exhibit 1 by Landlord and Tenant. 

	5.		All
defined terms used in this First Amendment shall have the same meaning as in the Original
Lease, except as expressly modified by this First Amendment. 

	

2.

	

	6. 		Except
as expressly modified by this First Amendment, the Original Lease shall remain in full
force and effect. 

	

     IN
WITNESS WHEREOF, Landlord and Tenant have executed this First Amendment on the respective
dates below set forth with the intent to be legally bound thereby as of the Effective
Date of this Amendment first above set forth.

			
			LANDLORD:

      

      
			ROTUNDA
      PARTNERS II, a California LLC

      

      

      

      
			
	Dated:     1/08/01                   
      
      

      	            	By:     /S/
      Mark A. Moss                                                        
      
      

                Mark
      A. Moss

                Managing Member

      

      

      

      
	 	  
			
			TENANT:

      

      
			SCIENTIFIC
      LEARNING CORPORATION, a Delaware corporation

      

      
	Dated:     1/04/01                               
      
      

    	  	By:     /S/
      Frank Mattson                                                        
      
      

    
	 	 	Title:     
      President                                                                  
      
      

    

	

3.

	

Exhibit 1 to First
Amendment to Lease

List of Tenant-borne
Improvements

	Description
      of Work 
      

    	FOB
      cost 
      

    	  	Pankow

      overhead 
      

    	 	 	Total
      cost 
      

    	 	 
	4
      each 208V isolation transformer	 	$       17,768	 	 	$            2,221	 	 	$      19,989	 	 
	 	 	 	 	 	 	 	 	 	 	 
	Wood
      lockers	 	$         2,715	 	 	$               339	 	 	$        3,054	 	 
	Wood
      locker installation	 	$            720	 	 	$                 90	 	 	$           810	 	 
	 	 	 	 	 	 	 	 	 	 	 
	dB
      sound block (7 rolls)	 	$         4,200	 	 	$               525	 	 	$        4,725	 	 
	installation
      of sound wall	 	$         7,687	 	 	$               961	 	 	$        8,648	 	 
	installation
      of dB block within wall	 	$         1,665	 	 	$               208	 	 	$        1,873	 	 
	less
      normal wall installation at 31' X $65	 	$        (2,015	)	 	$              (252	)	 	$       (2,267	)	 
	 	 	 	 	 	 	 	 	 	 	 
	Shower
      facilities, as described in building

      construction plans dated August 18, 2000	 	$ 25,000.00	 	 	$           3,125	 	 	$     28,125	 	 
	Hot
      water heater	 	$ 15,000.00	 	 	$           1,875	 	 	$     16,875	 	 
	 	 	 	 	 	 	 	 	 	 	 
	7th
      floor column removal	 	$  86,368.00	 	 	$                 —	 	 	$      86,368	 	 
	 	 	 	 	 	 	 	 	 	 	 
	Total	 	 	 	 	 	 	 	$   168,201	 	 
	 	 	 	 	 	 	 	 	 	 	 
	Amortized
      over 18 months/ per month charge	 	 	 	 	 	 	 	$10,101.63

	

Actual costs in regular type

Estimated costs in italics

	

SECOND
AMENDMENT to

LEASE dated
March 20, 2000

by and
between

ROTUNDA PARTNERS II, a
California limited liability company, as Landlord

and

SCIENTIFIC LEARNING
CORPORATION, a Delaware corporation, as Tenant

THIS SECOND AMENDMENT TO
LEASE is dated June 15, 2001 for reference purposes only, and is made by and
between ROTUNDA PARTNERS II, a California limited liability company
(“Landlord”) and SCIENTIFIC LEARNING CORPORATION, a Delaware
corporation (“Tenant”), to be effective and binding upon the parties
as of the date the last of the designated signatories to this Second Amendment
shall have executed the Amendment. 

WHEREAS, Landlord
and Tenant have entered into the Lease dated March 20, 2000 and a First
Amendment to Lease, dated December 29, 2000 (collectively, the “Existing
Lease”); and 

WHEREAS, Landlord
and Tenant now wish to finalize their agreement with respect to payment of the
costs for the additional work on the Premises that was requested by Tenant in
addition to the Improvements and the Base Building Improvements. 

NOW, THEREFORE,
Landlord and Tenant hereby agree as follows: 

	1.		In
addition to the Improvements and the Base Building Improvements, which Landlord was
required to construct and furnish at Landlord’s expense, and pursuant to the
agreement of Landlord and Tenant, Landlord retained Pankow Special Projects Limited to
perform additional work on the Premises requested by Tenant, all of which work has been
completed (the “Tenant-Borne Improvements”) . Landlord has agreed to pay all
costs of the Tenant-Borne Improvements. In exchange therefore, Tenant has agreed to pay
Landlord the sum of $250,000, in monthly installments. The amount of each monthly
installment shall be determined by amortizing $200,000 (together with simple interest at
a rate of ten percent (10%)) over the 18 month period commencing April 1, 2001 and
amortizing $50,000 (together with simple interest at a rate of ten percent (10%)) over
the 15 month period beginning July 1, 2001. Each monthly installment shall be paid to
Landlord as additional rent under section 3.2(e) of the Existing Lease. Tenant shall not
have any further liability for any work on the Premises performed through the date of
this Second Amendment. 

	2.		All
defined terms used in this Second Amendment shall have the same meaning as in the
Existing Lease, except as expressly modified by this Second Amendment. 

	3. 		Except
as expressly modified by this Second Amendment, the Existing Lease shall remain in full
force and effect.

	

1.

	

	     IN
WITNESS WHEREOF, Landlord and Tenant have executed this Second Amendment on the
respective dates below set forth with the intent to be legally bound thereby as of the
Effective Date of this Amendment first above set forth. 

			
			LANDLORD:

      

      
			ROTUNDA
      PARTNERS II, a California LLC

      

      

      

      
			
	Dated:     6/15/01                   
      
      

      	            	By:     /S/
      Mark A. Moss                                                        
      
      

                Mark
      A. Moss

                Managing Member

      

      

      

      
	 	  
			
			TENANT:

      

      
			SCIENTIFIC
      LEARNING CORPORATION, a Delaware corporation

      

      
	Dated:     6/15/01                               
      
      

    	  	By:     /S/
      Frank Mattson                                                        
      
      

    
	 	 	Title:     
      President                                                                  
      
      

    

	

2.

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