Ex parte HOFFMANN et al. - Page 10




                 Appeal No. 1999-1990                                                                                    Page 10                        
                 Application No. 08/635,599                                                                                                             


                 § 1.192(c)(7), claims 2 through 5 fall with claim 1.  Thus, it                                                                         
                 follows that the decision of the examiner to reject claims 2                                                                           
                 through 5 under 35 U.S.C. § 102(b) is also affirmed.                                                                                   


                 The obviousness issue                                                                                                                  
                          We sustain the rejection of claim 6 under 35 U.S.C. §                                                                         
                 103.                                                                                                                                   


                          In applying the test for obviousness , we reach the same         5                                                            
                 conclusion as the examiner (answer, p. 3).  That is, it would                                                                          
                 have been obvious to one of ordinary skill in the art at the                                                                           
                 time the invention was made to have modified Fabrik's liquid                                                                           
                 fuel burner to have an adjustable second passage as suggested                                                                          
                 and taught by Dunham's nozzle so as to permit adjustment of                                                                            
                 the fuel/air mixture to obtain optimum combustion efficiency                                                                           
                 as well-known in the art.                                                                                                              




                          5The test for obviousness is what the combined teachings                                                                      
                 of the references would have suggested to one of ordinary                                                                              
                 skill in the art.  See In re Young, 927 F.2d 588, 591, 18                                                                              
                 USPQ2d 1089, 1091 (Fed. Cir. 1991) and In re Keller, 642 F.2d                                                                          
                 413, 425, 208 USPQ 871, 881 (CCPA 1981).                                                                                               







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