Ex parte ANDERSON - Page 6

          Appeal No. 1997-2036                                                        
          Application No. 08/335,991                                                  

          Webster's definition of "chamber," "an enclosed space or                    
          compartment."  Further, the examiner asserts (Answer, page 4)               
          that "neither the claims nor the specification recite a                     
          structure of channels or chambers which clearly differentiates              
          the two elements," explaining that appellant's preferred                    
          dimensions do not distinguish between the two terms because                 
          appellant discloses that the dimensions may vary.                           
               Appellant's use of two separate terms in the claims,                   
          "channel" and "chamber," at the very least implies different                
          types of elements.  Also, the words "channel" and "chamber"                 
          differ in meaning.  Channels must have an opening at the top                
          and bottom, as they carry some form of fluid, whereas a                     
          chamber (as quoted by the examiner) is "an enclosed space or                
          compartment" (emphasis added).  (Chambers can have doors or                 
          openings, but channels cannot be completely enclosed.)                      
          Further, relative to chambers, channels have a higher length                
          to width ratio.                                                             

               In addition, appellant indicates in the specification and              
          drawings an intent for the terms to refer to different types                
          of elements.  Note, as pointed out by appellant (Brief, pages               

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