Ex Parte Christiansen et al - Page 4



          Appeal No. 2004-2153                                                        
          Application No. 09/923,510                                                  

          multiplexed onto a single modulated light beam. However, the                
          examiner notes that the optical communication system of                     
          Willebrand differs from appellants’ claimed subject matter in               
          that Willebrand fails to specifically teach data and control                
          information which are transmitted in packets and fails to teach             
          data packets time division multiplexed with control packets into            
          a single packet stream. To account for these differences the                
          examiner looks to Reichman, urging that                                     
               ...it is clear that Willebrand teaches that data                       
               and control information are multiplexed onto a                         
               single modulated light beam (reference numerals                        
               24,46 in Figure 11, column 13[,] lines 12-16, column                   
               15[,] lines 6-10). Furthermore, Willebrand teaches                     
               that control and data signals are encoded with each                    
               other and that a variety of different techniques are                   
               known and available for encoding and decoding                          
               information onto a from a [sic] fundamental wavelength                 
               (column 6[,] lines 37-48). One skilled in the art would                
               clearly have recognized that one of the well known                     
               methods of coding and decoding signals with one another                
               is via time division multiplexing. Reichman, in the same               
               field of endeavor, teaches it is well known in the art                 
               to time division multiplex control and data packets                    
               onto a single frequency (column 4[,] lines 54-62). It                  
               is clear that the teachings of Willebrand (column 6[,]                 
               lines 37-48 and reference numeral 46,48 in Figure 11)                  
               and the teachings of Reichman (column 4[,] lines 54-62)                
               would have suggested time division multiplexing of                     
               data and control packets to one skilled in the art.                    
               One skilled in the art would have been motivated to time               
               division multiplex control and data packets in order                   



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