Ex parte CHAN et al. - Page 9




          Appeal No. 1998-2661                                                        
          Application 08/633,267                                                      

          always has meant to connote that the execution unit                         
          effectively "sees" a larger storage space                                   
          than is physically actually available for use.  Hence, the                  
          artisan would have clearly realized from Kau's prior art                    
          logical registers that the number of virtual rename buffers of              
          claim 2 would have been larger in number than the actual                    
          physical rename registers.                                                  
               The discussion of pointers and lookup tables in the                    
          above-noted paragraph at column 2 of Kau renders obvious the                
          subject matter of claim 3 on appeal.                                        
               As to claim 8, appellants' admitted prior art at pages 2               
          and 3 indicate that architected registers are known in the art              
          to be used with rename registers.  Claim 8 does not define the              
          number of architected registers with respect to the number of               
          physical rename registers or the number of logical or virtual               
          registers.  As to claim 12, both Kau and appellants' admitted               
          prior art indicate that plural execution units are known to be              
          a part of  superscaler computer systems.                                    
               Turning to method independent claim 13, we apply this new              
          rejection for the reasoning set forth with respect to claims 1              
          through 3, 8 and 12.  Claim 13 is broader in one respect than               

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