Ex parte KAHLE et al. - Page 4




              Appeal No. 96-1426                                                                                                                             
              Application 08/001,863                                                                                                                         

                        Claims 1, 3, 6, and 7 stand rejected under 35 U.S.C.  102(a) as being anticipated by                                                
              Vassiliadis.                                                                                                                                   

                                                                  OPINION                                                                                    
                        We reverse.                                                                                                                          
                        "Anticipation is established only when a single prior art reference discloses, expressly or                                          
              under principles of inherency, each and every element of a claimed invention."  RCA Corp. v.                                                   
              Applied Digital Data Systems, Inc., 730 F.2d 1440, 1444, 221 USPQ 385, 388 (Fed. Cir. 1984).                                                   
                        Vassiliadis discloses "a data dependency collapsing arithmetic logic unit (ALU)," which                                              
              is the special three-to-one (three-operand, single-result) ALU of figure 9 to eliminate data hazard                                            
              interlocks using compounded instructions.  By "collapses data dependency" it is meant "that a pair                                             
              of instructions can be executed even when one of the pair requires as an operand the result                                                    
              produced by execution of the other of the pair of instructions" (column 3, lines 45-48).  "The term                                            
              'compounding' refers to grouping of instructions contained in a sequence of instructions, the                                                  
              grouping being for the purpose of concurrent or parallel execution of the grouped instructions.                                                
              At minimum, compounding is represented by 'pairing' of two instructions for simultaneous                                                       
              execution."  (Column 5, lines 13-19.)  "The proposed apparatus of this invention collapses these                                               
              interlocks by deriving new functions that arise from combining the execution of instructions whose                                             
              operands present data hazards while retaining the execution of functions inherent in the instruction                                           
              set" (column 8, lines 25-30).                                                                                                                  


                                                                      - 4 -                                                                                  





Page:  Previous  1  2  3  4  5  6  7  8  9  10  11  12  13  Next 

Last modified: November 3, 2007