PARINS et al. V. SLATER - Page 16




                 Interference No. 104,190                                                                                                               



                 Conception is complete when one of ordinary skill in the art                                                                           
                 could construct the apparatus without unduly extensive                                                                                 
                 research or experimentation.  Sewall v. Walters, 21 F.3d 411,                                                                          
                 416, 30 USPQ2d 1356, 1359.  See Summers v. Vogel, 332 F.2d                                                                             
                 810, 816, 141 USPQ 816, 821 (CCPA 1964); In re Tansel, 253                                                                             
                 F.2d 241, 243, 117 USPQ 188, 189 (CCPA 1958).  Priority,                                                                               
                 conception, and reduction to practice are questions of law                                                                             
                 which are based on subsidiary factual findings.  Cooper v.                                                                             
                 Goldfarb, 154 F.3d 1321, 1327,     47 USPQ2d 1896, 1901 (Fed.                                                                          
                 Cir. 1998).                                                                                                                            
                                   For evidence of conception, the junior party is                                                                      
                 relying on work done by Mark A. Rydell at Everest Medical in                                                                           
                 December 1991.  The junior party has also filed a renewed                                                                              
                 motion  to add Rydell as a named inventor.  The motion has9                                                                                                                           
                 been deferred to this final decision.                                                                                                  
                                   The record reflects that at least by August 26,                                                                      
                 1991, Rydell was at work at Everest on bipolar electrosurgical                                                                         
                 cauterizing scissors.  PR2; PX-2.  On December 4, 1991, Rydell                                                                         
                 recorded details of a new scissors embodiment on page 22 of                                                                            


                          9Paper No. 42.                                                                                                                
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