Document:

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                                                                   EXHIBIT 10.35

                                  A V A T E C H
                                S O L U T I O N S

                                 August 21, 2003

Henry D. Felton
13001 Dover Road
Reisterstown, MD 21136

     Re: Letter of Employment

Dear Mr. Felton:

     This Letter Agreement contains the terms of your continued employment with
Avatech Solutions, Inc. (together with its affiliates, subsidiaries,
successors-in-interest, and their affiliates and subsidiaries, "Avatech"). This
Letter Agreement is the entire agreement between you and Avatech relating to
your employment, and replaces all other employment or severance agreements
between you and Avatech, including, but not limited to, the Severance Agreement
between you and Avatech dated January 1, 1998. By signing below, you agree to be
bound by the terms and conditions contained in this Letter Agreement, effective
as of the date of your signature.

     In addition to your continued service as the Vice-Chairman of Avatech's
Board of Directors, you agree to perform all reasonable duties assigned to you
by the Board of Directors or one of Avatech's officers on a substantially
full-time basis. The term of your employment under this Letter Agreement shall
be for six (6) years, and may be extended or modified by a written agreement
between you and Avatech.

     In exchange for your services, Avatech will pay you an annual salary and
bonuses determined each year by the Compensation Committee of the Board of
Directors, commensurate with the amount and quality of the services you perform
or are expected to perform, but your annual salary will not, in any year, be
less than two thousand dollars ($2,000) plus the annual amount of the employee
contribution to Avatech's health benefit plans necessary to maintain the maximum
amount of medical coverage available to you through Avatech's health benefit
plans for you and your family. In addition, Avatech will continue to maintain
coverage substantially similar to the existing supplemental health insurance
policy it maintains, covering you for cancer-related expenses. You will be
entitled to perquisites comparable to those that Avatech extends to other
employees with similar responsibilities. Avatech will reimburse you for your
business, travel, lodging, meals, and any other ordinary and necessary business
expenses you incur in the course of your employment duties, in accordance with
Avatech's ordinary expense reimbursement policies.

     You may terminate your employment at any time, effective thirty (30) days
after you give Avatech written notice of your intent to terminate your
employment. Avatech may terminate your employment at any time for Cause (as
defined below), effective immediately on oral or

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Henry D. Felton
Letter Agreement
August 21, 2003
Page 2 of 3

written notice to you from one of Avatech's officers or a member of Avatech's
Board of Directors. For purposes of this Letter Agreement, "Cause" means: (a)
your conviction of, or plea of guilty or nolo contendere to, a crime
constituting a felony or a crime involving moral turpitude, embezzlement or
criminal diversion of funds; (b) your knowing and willful violation of Avatech's
company policies that can reasonably be expected to result in material detriment
to Avatech; or (c) your failure to perform the duties or discharge the
responsibilities of your position to Avatech's material detriment, unless you
cure such failure within fifteen (15) days after you receive written notice of
the failure, or within thirty (30) days, if the failure is such that it cannot
reasonably be cured within fifteen (15) days and you begin and diligently
continue to cure such failure within the fifteen-day period.

     You acknowledge that you have acquired and will acquire confidential
information relating to Avatech which includes, but is not limited to, business
plans, sales and marketing plans, financial information, acquisition prospects,
and "customer" and "supplier" lists (as such terms may relate to Avatech's
business or the systems or other trade secrets or know-how) (collectively
"Confidential Information"), which is a valuable asset of Avatech's business,
and access to or knowledge of which is essential to the performance of your
duties. Accordingly, you will not disclose any Confidential Information at any
time, except in connection with and as reasonably required to perform your
employment duties or your duties or responsibilities as a member of Avatech's
Board of Directors, or unless you are required to do so by applicable law,
subpoena, court order, or other legal process. These restrictions do not apply
to, and the definition of Confidential Information does not include, information
that is in the public domain at the time you disclose such information, unless
the information is in the public domain as a result of your actions. Your
obligation not to disclose any Confidential Information continues for your
lifetime and survives the termination or expiration of this Agreement, your
employment with Avatech, or any current future agreement between you and Avatech
or its successors-in-interest.

     Because of your unique position as an employee of Avatech, you agree that
during the course of your employment and for a period of one (1) year after the
termination of such employment, you will not, without Avatech's prior written
consent: (a) Directly or indirectly, knowingly engage or be interested in (as
owner, partner, shareholder, employee, director, officer, agent, consultant or
otherwise), with or without compensation, any business entity or operation that
engages in the business of selling computer-aided design software or providing
professional, consulting, technical, or training services related to
computer-aided design software within fifty (50) miles of any location where
Avatech maintains a place of business, except that you Employee own up to a five
percent (5%) interest in the publicly-traded securities of a publicly traded
corporation; (b) Employ or retain, or participate in or arrange the employment
or retention of any person who Avatech employed or retained during the term of
Employee's employment with or retention by Avatech under any arrangement or
agreement; or (c) Directly or indirectly solicit any of Avatech's customers or
clients.

     You acknowledge that the provisions of this Letter Agreement are reasonable
and necessary for Avatech's protection and that Avatech will be irrevocably
damaged if these provisions are not specifically enforced. Accordingly, you
agree that, in addition to any other

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Henry D. Felton
Letter Agreement
August 21, 2003
Page 3 of 3

relief or remedies available to Avatech, Avatech is entitled to seek and obtain
an appropriate injunction or other equitable remedy for the purposes of
restraining you from any actual or threatened breach of or otherwise enforcing
these provisions and no bond or security will be required in connection with
such equitable remedy.

     You and Avatech agree that this Letter Agreement shall be construed,
interpreted and enforced as a contract governed by the laws of the State of
Maryland without reference to the rules governing conflict of laws, and
irrevocably submit to personal jurisdiction and venue in the State of Maryland
for the purpose of any suit, action or proceeding arising out of or relating to
this Letter Agreement. The waiver of any breach of this Letter Agreement by
either you or Avatech does not constitute or operate as a waiver of any other
breach of any provision of this Letter Agreement, and any failure to enforce any
provision of this Letter Agreement does not operate as a waiver of any existing
or future right, duty, or obligation arising out of this Letter Agreement. If
any provision of this Letter Agreement is deemed invalid or unenforceable in any
jurisdiction, such provision will be deemed modified and limited in such
jurisdiction to the extent necessary to make it valid and enforceable in such
jurisdiction, and the remainder of this Letter Agreement shall be valid and
enforced to the fullest extent permitted by law.

/s/                                        AVATECH SOLUTIONS, INC.
--------------------------------
Henry D. Felton

                                           By: /s/
                                               ---------------------------------
Date: 8/21/03                                  Donald "Scotty" Walsh,
                                               Chief Executive OfficerSecond Amendment to the Rights Agreement dated 10/02/2003

 Exhibit 4.3 
  
 SECOND AMENDMENT 
 to the 
 RIGHTS AGREEMENT 
 between 
 REDBACK NETWORKS INC. 
 and 
 US STOCK TRANSFER CORPORATION 
  
 This Second Amendment (the “Amendment”) to the Rights Agreement is made and entered into as of October 2, 2003 between REDBACK NETWORKS INC., a
Delaware corporation (the “Company”), and US STOCK TRANSFER CORPORATION, as Rights Agent (the “Rights Agent”). 
  
 B A C K G R O U N D 
  
 WHEREAS, the Company and the Rights Agent entered into the Rights Agreement dated as of June 12, 2001, and amended on May 21, 2002 (the
“Rights Agreement”); 
  
 WHEREAS, Section 27 of
the Rights Agreement provides that, in certain circumstances, the Company may supplement or amend the Rights Agreement without the approval of any holders of Rights; 
  
 WHEREAS, the Board of Directors of the Company has approved a financial restructuring (the “Financial
Restructuring”) that contemplates the completion of one of two separate transactions: either (A) an out-of-court “Recapitalization Plan” that consists, in part, of (i) an offer to exchange all of the Company’s outstanding 5%
Convertible Subordinated Notes due 2007 (“Notes”) for up to 47,500,000 shares of the Company’s Common Stock (the “Recapitalization Shares”), subject to the satisfaction or waiver of certain conditions, (ii) an amendment and
restatement of the Company’s current Amended and Restated Certificate of Incorporation to implement an approximate 73.39:1 reverse stock split of all outstanding shares of Common Stock of the Company (the “Reverse Stock Split”), and
(iii) the issuance of two series of warrants (the “Warrants”) to the Company’s existing stockholders, on a pro rata basis, to purchase an aggregate of up to 5,401,662 shares of Common Stock (the “Warrant Shares”); or (B) a
“Prepackaged Plan of Reorganization” through which the Financial Restructuring would be accomplished in bankruptcy court. 
  
 WHEREAS, upon consummation of the Reverse Stock Split, Section 11(n) of the Rights Agreement would require a proportional adjustment to the number
of Rights associated with each share of Common Stock. 
  
 WHEREAS, on August 4, 2003, the Board of Directors of the Company resolved to amend the Rights Agreement to, among other things, (i) render the Rights inapplicable to the issuance of the Recapitalization Shares, Warrants and Warrant
Shares contemplated by the Financial Restructuring pursuant to the Recapitalization Plan or the issuance of Common Stock, Warrants or Warrant Shares contemplated by the Financial Restructuring pursuant to the Prepackaged Plan of Reorganization and
(ii) in connection with the Reverse Stock Split, waive the proportional adjustment to the number of Rights associated with each share of Common Stock under the Rights Agreement; 
  

 WHEREAS, the warrant issued by the Company to Nokia Finance International BV (“Nokia”)
to purchase up to that number of shares of Common Stock as may be necessary to increase Nokia’s aggregate holdings of the Company’s Common Stock to 31,901,467 shares of Common Stock and certain other contractual rights held by Nokia to
acquire shares of Common Stock were terminated prior to the date of this Amendment; 
  
 WHEREAS, the Company desires to modify the terms of the Rights Agreement in certain respects as set forth herein, and in connection therewith, is entering into this Amendment and directing the Rights Agent to
enter into this Amendment; 
  
 NOW, THEREFORE, for good and
valuable consideration, the receipt and adequacy of which are hereby acknowledged, the parties hereto agree as follows: 
  
 1.    Effect of Amendment.    Except as expressly provided herein, the Rights Agreement shall be and remain
in full force and effect. 
  
 2.    Capitalized Terms.    All capitalized, undefined terms used in this Amendment shall have the meanings assigned thereto in the Rights Agreement. 
  
 3.    Removal of Certain
Definitions.    The definitions for “Purchase Agreement”, “Initial Shares”, “Warrant”, “Investor’s Rights Agreement” and “Investor” contained in Section 1 of the Rights
Agreement shall be removed from the Rights Agreement and shall have no further force or effect. 
  
 4.    Supplement to Definitions.    The definitions contained in Section 1 of the Rights Agreement shall be
supplemented by adding the following subsections (gg) through (pp) to Section 1 of the Rights Agreement: 
  
 “(gg)    “Exchange Offer” shall mean the offer by the Company to exchange all of the Company’s outstanding Notes
for the Restructuring Shares. 
  
 (hh)    “Financial Restructuring” shall mean the financial restructuring of the Company’s debt and equity securities pursuant to either the Recapitalization Plan or the Prepackaged Plan of Reorganization.

  
 (ii)    “Noteholder” shall mean
a holder of Notes and any of its permitted assigns. 
  
 (jj)    “Notes” shall mean the Company’s 5% Convertible Subordinated Notes due 2007. 
  
 (kk)    “Prepackaged Plan of Reorganization” shall mean the in-court restructuring under Chapter 11 of the United States
Bankruptcy Code, Title 11 of the United States Code, approved by the Company’s Board of Directors. 
  

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 (ll)    “Recapitalization Plan” shall mean the Company’s out-of-court
restructuring consisting, in part, of (i) the Exchange Offer, (ii) the Reverse Stock Split, and (iii) the issuance of the Restructuring Warrants. 
  
 (mm)    “Restructuring Shares” shall mean up to 47,500,000 shares of Common Stock issuable to holders of Notes pursuant to
the Financial Restructuring. 
  
 (nn)    “Restructuring Warrants” shall mean two series of warrants to purchase the Restructuring Warrant Shares to be issued to the Company’s existing stockholders, on a pro rata basis, in connection with
the implementation of the Financial Restructuring. 
  
 (oo)    “Restructuring Warrant Shares” shall mean up to an aggregate of 5,401,662 shares of Common Stock issuable upon exercise of the Restructuring Warrants. 
  
 (pp)    “Reverse Stock Split” shall mean the
73.3925456:1 reverse stock split of all outstanding shares of Common Stock to be made in connection with the Financial Restructuring.” 
  
 5.    Amendment to Section 1(a).    Section 1(a) of the Rights Agreement is hereby amended in its entirety
to read as follows: 
  
 “(a)  “Acquiring
Person” shall mean any Person (as such term is hereinafter defined) who or which shall be the Beneficial Owner (as such term is hereinafter defined) of 15% or more of the shares of Common Stock then outstanding, but shall not include an Exempt
Person (as such term is hereinafter defined); provided, however, that (i) if the Board of Directors of the Company determines in good faith that a Person who would otherwise be an “Acquiring Person” became the Beneficial
Owner of a number of shares of Common Stock such that the Person would otherwise qualify as an “Acquiring Person” inadvertently (including, without limitation, because (A) such Person was unaware that it beneficially owned a percentage of
Common Stock that would otherwise cause such Person to be an “Acquiring Person” or (B) such Person was aware of the extent of its Beneficial Ownership of Common Stock but had no actual knowledge of the consequences of such Beneficial
Ownership under this Agreement) and without any intention of changing or influencing control of the Company, then such Person shall not be deemed to be or to have become an “Acquiring Person” for any purposes of this Agreement unless and
until such Person shall have failed to divest itself, as soon as practicable (as determined, in good faith, by the Board of Directors of the Company), of Beneficial Ownership of a sufficient number of shares of Common Stock so that such Person would
no longer otherwise qualify as an “Acquiring Person”; (ii) if, as of the date hereof or prior to the first public announcement of the adoption of this Agreement, any Person is or becomes the Beneficial Owner of 15% or more of the shares of
Common Stock outstanding, such Person shall not be deemed to be or to become an “Acquiring Person” unless and until such time as such Person shall, after the first public announcement of the adoption of this Agreement, become the
Beneficial Owner of additional shares of Common Stock (other than pursuant to a dividend or distribution paid or made by the Company on the outstanding Common Stock or pursuant to a split or subdivision of the outstanding Common Stock), unless, upon
becoming the Beneficial Owner of such additional shares of Common Stock, such Person is not then the Beneficial Owner of 15% or more of the shares of Common Stock then outstanding; and (iii) no Person shall become an “Acquiring Person” as
the result of an acquisition of shares of Common Stock by the Company 
  

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 which, by reducing the number of shares outstanding, increases the proportionate number of shares of Common Stock
beneficially owned by such Person to 15% or more of the shares of Common Stock then outstanding, provided, however, that if a Person shall become the Beneficial Owner of 15% or more of the shares of Common Stock then outstanding by
reason of such share acquisitions by the Company and shall thereafter become the Beneficial Owner of any additional shares of Common Stock (other than pursuant to a dividend or distribution paid or made by the Company on the outstanding Common Stock
or pursuant to a split or subdivision of the outstanding Common Stock), then such Person shall be deemed to be an “Acquiring Person” unless upon becoming the Beneficial Owner of such additional shares of Common Stock such Person does not
beneficially own 15% or more of the shares of Common Stock then outstanding. Notwithstanding any of the foregoing, no Noteholder nor any of its Affiliates or Associates shall be deemed to be or to have become an “Acquiring Person” solely
on account of the acquisition or Beneficial Ownership of Restructuring Shares, Restructuring Warrants or Restructuring Warrant Shares in connection with the Financial Restructuring pursuant to the Recapitalization Plan or the Prepackaged Plan of
Reorganization; provided, however, that in the event any Noteholder or any of its Affiliates or Associates shall become the Beneficial Owner of any additional shares of Common Stock (other than by acquisition of Restructuring Shares,
Restructuring Warrants or Restructuring Warrant Shares, pursuant to a dividend or distribution paid or made by the Company on the outstanding Common Stock or pursuant to a split or subdivision of the outstanding Common Stock), then any such
Noteholder and its Affiliates and Associates shall be deemed to be “Acquiring Persons” unless upon becoming the Beneficial Owner of such additional shares of Common Stock, such Noteholder and its Affiliates and Associates do not
beneficially own 15% or more of the shares of Common Stock then outstanding (including, without limitation, for purposes of this calculation, all Restructuring Shares, Restructuring Warrants or Restructuring Warrant Shares acquired in connection
with the Financial Restructuring). For all purposes of this Agreement, any calculation of the number of shares of Common Stock outstanding at any particular time, including for purposes of determining the particular percentage of such outstanding
shares of Common Stock of which any Person is the Beneficial Owner, shall be made in accordance with the last sentence of Rule 13d-3(d)(1)(i) of the General Rules and Regulations under the Securities Exchange Act of 1934, as amended (the
“Exchange Act”), as in effect on the date hereof.” 
  
 6.    Amendment to Section 11(n).    Section 11(n) of the Rights Agreement is hereby amended in its entirety to read as follows: 
  
 “(n)  Anything in this Agreement to the contrary notwithstanding, in the event that at any time after the
date of this Agreement and prior to the Distribution Date, the Company shall (i) declare and pay any dividend on the Common Stock payable in Common Stock or (ii) effect a subdivision, combination or consolidation of the Common Stock (by
reclassification or otherwise than by payment of a dividend payable in Common Stock) into a greater or lesser number of shares of Common Stock, then, in each such case, the number of Rights associated with each share of Common Stock then
outstanding, or issued or delivered thereafter, shall be proportionately adjusted so that the number of Rights thereafter associated with each share of Common Stock following any such event shall equal the result obtained by multiplying the number
of Rights associated with each share of Common Stock immediately prior to such event by a fraction the numerator of which shall be the total number of shares of Common Stock outstanding immediately prior to the occurrence of the event and the
denominator of which shall be the total number of shares of Common Stock outstanding immediately following the occurrence of such event; provided, however, that no adjustment shall be made to the number of Rights associated with each
share of Common Stock as a result of the Reverse Stock Split effected in connection with the Financial Restructuring.” 
  

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 7.    Effective Date.    This Amendment shall be effective
immediately prior to the earlier of (i) the commencement of the Exchange Offer or (ii) the filing of the Prepackaged Plan of Reorganization with a bankruptcy court. 
  
 8.    Governing Law.    This Amendment shall be governed by, construed and
enforced in accordance with the laws of the State of Delaware without reference to the conflicts or choice of law principles thereof. 
  
 9.    Counterparts.    This Amendment may be executed in separate counterparts, each of which when executed
and delivered is an original but all of which taken together constitute one and the same instrument. 
  
 10.    Fax Transmission.    A facsimile, telecopy or other reproduction of this Amendment may be executed
by one or more parties hereto, and an executed copy of this Amendment may be delivered by one or more parties hereto by facsimile or similar instantaneous electronic transmission device pursuant to which the signature of or on behalf of such party
can be seen, and such execution and delivery shall be considered valid, binding and effective for all purposes. At the request of any party hereto, all parties hereto agree to execute an original of the Amendment as well as any facsimile, telecopy
or other reproduction thereof. 
  
  
  
 [Remainder of Page Intentionally Left Blank] 
  
  

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 IN WITNESS WHEREOF, the Company and the Rights Agent have caused this Amendment to be duly executed as of
the day first above written. 
  

	REDBACK NETWORKS INC.
		
	 By:
	 	/s/    THOMAS L. CRONAN III
	 	 	

	 Name:
	 	Thomas L. Cronan III
	 Title:
	 	Senior Vice President of Finance and Administration and Chief Financial Officer
	 	 	 
	US STOCK TRANSFER CORPORATION
as Rights Agent
		
	 By:
	 	/s/    WILLIAM GARZA
	 	 	

	 Name:
	 	William Garza
	 Title:
	 	Vice President

  
  
  
  
  
  
 [Signature Page to Second Amendment to the Rights Agreement]

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