Ex Parte Calo et al - Page 11



             Appeal 2007-0394                                                                                    
             Application 09/769,036                                                                              
                          When a work is available in one field of endeavor, design                              
                          incentives and other market forces can prompt variations                               
                          of it, either in the same field or a different one.   If a                             
                          person of ordinary skill can implement a predictable                                   
                          variation, §103 likely bars its patentability.   For the same                          
                          reason, if a technique has been used to improve one                                    
                          device, and a person of ordinary skill in the art would                                
                          recognize that it would improve similar devices in the                                 
                          same way, using the technique is obvious unless its                                    
                          actual application is beyond his or her skill.                                         
             Id. at 1740, 82 USPQ2d at 1396.  The operative question in this “functional                         
             approach” is thus “whether the improvement is more than the predictable use of                      
             prior art elements according to their established functions.”  Id.                                  
                   The Supreme Court stated that “[f]ollowing these principles may be more                       
             difficult in other cases than it is here because the claimed subject matter may                     
             involve more than the simple substitution of one known element for another or the                   
             mere application of a known technique to a piece of prior art ready for the                         
             improvement.”  Id.  The Court explained, “[o]ften, it will be necessary for a court                 
             to look to interrelated teachings of multiple patents; the effects of demands known                 
             to the design community or present in the marketplace; and the background                           
             knowledge possessed by a person having ordinary skill in the art, all in order to                   
             determine whether there was an apparent reason to combine the known elements in                     
             the fashion claimed by the patent at issue.”  Id. at 1740-41, 82 USPQ2d at 1396.                    
             The Court noted that “[t]o facilitate review, this analysis should be made explicit.”               
             Id., citing In re Kahn, 441 F.3d 977, 988, 78 USPQ2d 1329, 1336 (Fed. Cir. 2006)                    
             (“[R]ejections on obviousness grounds cannot be sustained by mere conclusory                        

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