Ex parte TOWFIQ - Page 6




          Appeal No. 1999-2720                                                        
          Application No. 08/580,965                                                  
          1540, 1548, 220 USPQ 303, 309 (Fed. Cir. 1983), cert. denied,               
          469 U.S. 851 (1984).                                                        
               On page 3 the brief, Appellant argues that the cited                   
          references do not disclose or suggest all of the explicit                   
          limitations set forth in the claims.  In particular, Appellant              
          avers2 that neither reference includes the step of copying an               
          initial version S1 to yield a copy S1' of the initial version.              
               Appellant also asserts3 that no one of ordinary skill in               
          the art would have been motivated to combine Tichy and                      
          Ambriola at the time the invention was made, as the references              
          are contradictory and teach away from each other.  Appellant                
          notes Tichy's teaching of a Revision Control System (RCS)                   
          which, in performing version control, stores revisions in the               
          form of                                                                     





          reverse deltas.  He then points to Tichy's specific statement4              


               2Brief, page 6                                                         
               3Brief, pages 4-6, and Reply Brief, pages 2-3                          
               4Page PSD:13-5, Section 3.2, paragraph 3                               
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