Ex parte HOFFMANN et al. - Page 6




          Appeal No. 97-2763                                                          
          Application No. 08/580,790                                                  


                                       OPINION                                        
               All of the obviousness rejections of claims 1 through 8                
          are reversed.                                                               
               The examiner is of the opinion that the forming steps,                 
          the transmitting steps, and the evaluating steps of claims 1                
          through 8 are taught by each of the applied references                      
          (Answer, pages 4, 6 and 8).  The examiner acknowledges                      
          (Answer, pages 4, 6 and 8) that neither of the references                   
          teaches that “the transition monitoring cells are replaced                  
          with cells whose regular error detecting code word covers an                
          entire cell block.”  The examiner concludes (Answer, pages 4                
          through 6, 8 and 9) that “it is well known in the art to use a              
          redundancy character across a block of information (a CRC                   
          redundancy check for example)," and that it would have been                 
          obvious to one of ordinary skill in the art to modify each of               
          the applied references to include “a block check word because               
          one of ordinary skill in the art would want to make certain                 
          that when a block of information is transmitted errors are not              
          generated.”                                                                 
               Izawa discloses the use of either asynchronous                         
          transmission mode (ATM) cells (Figure 2) or synchronous                     
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