Ex parte SILVIS - Page 6




              Appeal No. 1998-2958                                                                                        
              Application No. 08/671,516                                                                                  


              types” was well known, “it would have involved only routine skill to select which one to use based upon     

              the data available as well as the ease of solving a particular ‘calculation type.’”  It appears to us that the

              examiner’s reasoning amounts to impermissible hindsight since only appellant’s disclosure teaches the       

              desirability of having the predetermined set of calculation types stored in the computer system to allow    

              selection of a calculation type.  As explained by appellant, at page 4 of the brief, and supported by the   

              Summary Of The Invention section of the instant specification, this permits appellant to calculate the      

              air/fuel ratio “according to the measurement situation or the preference of the user” and can be            

              “especially valuable in a situation where initially an oxygen gas measurement is previously available, but  

              is no longer available for whatever reason...”  Thus, the instant claims specifically require the selection 

              of a calculation type from a predetermined set of calculation types and the claim limitation is explained   

              to be for a specific purpose.  Yet, the evidence relied on by the examiner for a showing of obviousness     

              fails to teach the explicit claim limitation of such a selection and there is no suggestion by any evidence 

              proffered by the examiner as to why the artisan might want to have the capability of selecting a            

              calculation type from a predetermined set of calculation types stored in a computer system.                 



                     Accordingly, we hold that the examiner has failed to present a prima facie case of obviousness       

              under 35 U.S.C. § 103 with regard to the instant claimed subject matter.                                    




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