Document:

CONTRACT
      ASSIGNMENT

    

    

    For
      good
      and valuable consideration, the sufficiency and receipt of which is hereby
      acknowledged by the parties hereto, Identica Corp. (hereinafter “Assignor”)
      assigns, sells, conveys, and transfers all of Assignor’s interest to Identica
      Holdings Corporation (hereinafter “Assignee”) in the contract(s) described as
      follows:

    

    
      	
              1a.

            	
              Distribution
                Agreement and addendums and extensions by and between Identica Corp.
                and
                Techsphere Co. Ltd , dated April 30, 2005;

            

    

     

    
      	
              1.b

            	
              Shareholders
                Agreement by and between the Shareholders of Identica Corp. and Identica
                Corp., dated August 10, 2005,

            

    

     

    
      	
              1.c

            	
              Consulting
                Services Agreement by and between Faward Holdings Ltd and Identica
                Corp.,
                dated May 1, 2005

            

    

     

    
      	
              1.d

            	
              Consulting
                Services Agreement by and between 1462869 Ontario Inc. and Identica
                Corp.,
                dated May 1, 2005

            

    

     

    
      	
              1.e

            	
              Consulting
                Services Agreement by and between David Clayden and Identica Corp.,
                dated
                May 1, 2005

            

    

     

    
      	
              1.f

            	
              Consulting
                Services Agreement by and between SDS-Sonsitar
                Data Services Inc. and
                Identica Corp., dated May 1, 2005

            

    

    

    
      	
              2.

            	
              Assignor
                agrees that all rights and obligations of Assignor arising under
                the above
                listed contract(s) or otherwise by law or by the existence of conditions
                precedent, which may or may not have occurred as of the date of this
                Assignment, are hereby included in this Assignment and Assignee hereby
                agrees to accept same as if Assignee was an original party to the
                aforesaid contract(s).

            

    

    

    
      	
              3.

            	
              Assignor
                represents and warrants that the interest of Assignor in the contract(s)
                subject to this Assignment is free of liens, claims or encumbrances
                of any
                kind by third parties, except the
                following:

            

    

    

    
      	
              4.

            	
              Assignee
                agrees to hold harmless and indemnify Assignor for such liens, claims
                or
                encumbrances of any kind to which the above listed contracts are
                subject
                and which have disclosed and described by Assignor
                hereinabove.

            

    

    

    
      	
              5.

            	
              This
                Assignment shall be binding upon and inure to the benefit of Assignor
                and
                Assignee and their respective affiliates, successors, assigns, heir
                and
                devisees and legal representatives.

            

    

    

    
      	
              6.

            	
              It
                is the intention of the parties that in the event a court of competent
                jurisdiction finds that any provision or portion of this Assignment
                is
                unenforceable for any reason, the balance and remainder of this Assignment
                shall remain effective and enforceable to the extent possible under
                the
                circumstances then existing.

            

    

     

    
      
         

      

      
        -
          1
          -

        
          

        

      

      
         

      

    

     

    
      
        

      

       

    

    
      	
              7.

            	
              Assignor
                and Assignee agree that this Assignment shall be deemed governed
                by the
                laws of the State of Nevada and, further, each agrees to submit to
                the
                subject matter and personal jurisdiction of the courts of that
                state.

            

    

    

    
      	
              8.

            	
              This
                Assignment supercedes all prior and contemporaneous agreements and
                discussions of the parties hereto regarding the subject matter hereof
                and
                the contract(s) assigned hereby and, as written, constitutes the
                entire
                agreement of the parties.

            

    

    

    AGREED,
      signed and made effective this the 18th
      day
      of November, 2005.

    

    

      
        	 	
                Identica
                  Corp.   /s/ Terry
                  Wheeler                           
                  

              
	 	 
	 	 
	 	
                By:
                  Terry Wheeler, President

              
	 	 
	 	 
	 	
                Identica
                  Holdings Corporation   /s/ Edward
                  Foster                      
                  

              
	 	 
	 	
                By:
                  Edward Foster, CEO

              

      

    

     

     

    
      
         

      

      
        -
          2
          -Execution Copy
                                                                     EXHIBIT 4.1
                                                                     -----------

                                 AMENDMENT NO. 3
                                 ---------------

     This AMENDMENT No. 3, dated as of September 29, 2006  ("Amendment  No. 3"),
is entered into by and among DAYTON SUPERIOR  CORPORATION,  an Ohio  corporation
("Borrower"),  and the persons  designated as "Lenders" whose signatures  appear
below.

     WHEREAS,  Borrower, the Lenders (as defined therein) and Agent are party to
the Credit  Agreement,  dated as of January 30, 2004 as amended by Amendment No.
1, dated as of June 30, 2004 and  Amendment No. 2, dated as of February 23, 2005
("Original  Credit  Agreement";  all  capitalized  terms defined in the Original
Credit Agreement and not otherwise  defined herein to have the meanings assigned
thereto in the Original Credit Agreement or in Annex A thereto); and

     WHEREAS,  Borrower  has  requested  that the Original  Credit  Agreement be
amended in the manner set forth below.

NOW, THEREFORE, in consideration of the premises and the agreements,  provisions
and covenants herein contained, Borrower and the Lenders whose signatures appear
below agree as follows:

                                   SECTION 1.
                                    AMENDMENT

Subject to the  satisfaction  of the conditions set forth in Section 2, the term
"Commitment  Termination  Date" in Annex A of the Original  Credit  Agreement is
amended by deleting the phrase "January 30, 2007" and adding the phrase "May 31,
2008" in its place.

                                   SECTION 2.
                           CONDITIONS TO EFFECTIVENESS
                           ---------------------------

This Amendment No. 3 shall become  effective on the date (the "Effective  Date")
on which the following  conditions are met,  which,  in any event,  shall not be
later than October 6, 2006:
     (a) Agent shall have received one or more  counterparts  of this  Amendment
No. 3 executed and delivered by Borrower and Lenders; and
     (b)  there  shall be no  continuing  Default  or Event of  Default  and the
representations  and  warranties of Borrower  contained in this  Amendment No. 3
shall be true and  correct in all  material  respects as of the  Effective  Date
(except that any  representation  or warranty  that  relates to a specific  date
shall be true and correct in all material respects as of such date).

                                   SECTION 3.
                               LIMITATION ON SCOPE
                               -------------------

     Except as expressly amended hereby, all of the representations, warranties,
terms, covenants and conditions of the Loan Documents shall remain in full force
and effect in accordance with their  respective  terms. The amendments set forth
herein shall be limited precisely as provided for herein and shall not be deemed
to be waivers of,  amendments of,  consents to or  modifications  of any term or
provision of the Loan Documents or any other document or instrument  referred to
therein  or of any  transaction  or  further  or  future  action  on the part of
Borrower  requiring  the  consent  of  Agent or  Lenders  except  to the  extent
specifically  provided  for herein.  Agent and Lenders have not and shall not be
deemed to have  waived  any of their  respective  rights  and  remedies  against
Borrower for any existing or future Defaults or Event of Default.

<PAGE>

                                   SECTION 4.
                                  MISCELLANEOUS
                                  -------------

     (a) Borrower hereby represents and warrants as follows:

        (i) this  Amendment  No. 3 has been  duly  authorized  and  executed  by
Borrower and the Original Credit Agreement,  as amended by this Amendment No. 3,
is the legal,  valid and binding obligation of Borrower that is a party thereto,
enforceable in accordance with its terms,  except as such  enforceability may be
limited by  applicable  bankruptcy,  moratorium  and similar laws  affecting the
rights of creditors in general; and

        (ii) Borrower repeats and restates the representations and warranties of
Borrower  contained  in the  Original  Credit  Agreement  as of the date of this
Amendment  No.  3 and as of the  Effective  Date,  except  to  the  extent  such
representations and warranties relate to a specific date.

     (b) This Amendment No. 3 is being delivered in the State of New York.

     (c) Borrower hereby  ratifies and confirm the Original Credit  Agreement as
amended hereby, and agree that, as amended hereby, the Original Credit Agreement
remains in full force and effect.

     (d) Borrower agrees that all Loan Documents remain in full force and effect
notwithstanding the execution and delivery of this Amendment No. 3.

     (e) This  Amendment No. 3 may be executed by the parties hereto in separate
counterparts,  each of which when so executed and  delivered  shall be deemed an
original,  but all of which  counterparts  together shall constitute but one and
the same instrument.

     (f) All references in the Loan  Documents to the "Credit  Agreement" and in
the Original Credit Agreement as amended hereby to "this  Agreement,"  "hereof,"
"herein" or the like shall mean and refer to the  Original  Credit  Agreement as
amended  by this  Amendment  No.  3 (as  well as by all  subsequent  amendments,
restatements, modifications and supplements thereto).

     (g) Each of the following  provisions of the Original  Credit  Agreement is
hereby  incorporated herein by this reference with the same effect as though set
forth in its entirety herein,  mutatis  mutandis,  and as if "this Agreement" in
any such provision read "this  Amendment No. 3": Section 9.3 (Notices),  Section
9.6,  (Severability),  Section 9.8  (Headings),  Section 9.9  (Applicable  Law),
Section  9.12  (Construction),  Section  9.15 (Waiver of Jury Trial) and Section
9.17 (Entire Agreement).

                            [signature pages follow]

<PAGE>

WITNESS the due execution  hereof by the respective duly authorized  officers of
the undersigned as of the date first written above.

                                  BORROWER:
                                  DAYTON SUPERIOR CORPORATION

                                  By: /s/ Edward J. Puisis
                                      --------------------
                                      Name: Edward J. Puisis
                                      Vice President and Chief Financial Officer

                                  LENDERS:

                                  GENERAL ELECTRIC CAPITAL CORPORATION,
                                  as a Lender

                                  By: /s/ Daniel D. McCready
                                      ----------------------
                                      Name: Daniel D. McCready
                                      Title: Its Duly Authorized Signatory

                                  GMAC COMMERCIAL FINANCE LLC,
                                  as a Lender

                                  By: /s/ Robert J. Brandow
                                      ---------------------
                                      Name: Robert J. Brandow
                                      Title: Director

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