Ex parte IGARASHI et al. - Page 7

          Appeal No. 1998-0884                                       Page 7           
          Application No. 08/084,642                                                  

               connect the compression path having the least error                    
               to downstream processing circuitry.  [Col. 8, ll.                      
          By selecting between frame-based predictive encoding and                    
          field-based predictive encoding based on which encoding                     
          technique produces a smaller error, Krause bases selection on               

               Selection based on the accuracy of data is not tantamount              
          to selection based on the quantity of the data.  We see no                  
          inconsistency between this conclusion and the rule that the                 
          U.S. Patent and Trademark Office (PTO) should give claims                   
          their broadest reasonable interpretation during prosecution.                
          “The operative word is reasonable: the PTO has no such                      
          obligation regarding unreasonable interpretations.”                         
          Genentech, Inc. v. Wellcome Foundation Ltd., 29 F.3d 1555,                  
          1564 n. 22, 31 USPQ2d 1161, 1168 n.22 (Fed. Cir. 1994).                     

               Because Krause bases selection on the accuracy of data,                
          we are not persuaded that the reference discloses the claimed               
          limitation of “selecting said frame-based predictive encoding               

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