Ex parte SHRINKLE et al. - Page 6

          Appeal No. 1997-1174                                                        
          Application 08/353,681                                                      

               The Examiner responds that Cardero provides for baseline               
          shift adjustment (answer-pages 2 and 3).                                    
               Appellants urge that Fennema is non-analogous prior art,               
          i.e., the track seeking art, but has not clearly identified                 
          their art.  We agree with the Examiner that Fennema is                      
          analogous prior art, the disk drive art.                                    
               Appellants argue that Fennema’s goal is not signal                     
          difference minimization, Fennema’s goal is track centering,                 
          and state:                                                                  
                         Even if Fennema’s amplitude difference                       
                    technique were somehow combined with                              
                    Christner et al., the result would still                          
                    fail to meet the asymmetry portions of                            
                    Applicant’s claim 12. ... It is clear from                        
                    the quoted language of claim 12 that the                          
                    asymmetry correction means is part of the                         
                    processing means that processes digital                           
                    samples, and that the asymmetry correction                        
                    means generates the digital compensated                           
                    signal.  The only signal in Fennema                               
                    comparable to the digital compensated                             
                    signal is Fennema’s TES [track error                              
                    signal] signal whose positive and negative                        
                    peaks are defined by the position of the                          
                    head.  It is clear that the mechanical                            
                    movement of Fennema’s head to define the                          
                    positive and negative peaks is not                                
                    equivalent to Applicant’s signal processing                       
                    of digital samples to define the positive                         
                    and negative peaks, and that the Fennema                          
                    system of involving the actuator and head                         
                    [and head] movement is not the structural                         

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