Ex Parte Steele - Page 6

                 Appeal 2007-2218                                                                                        
                 Application 10/035,595                                                                                  


                        9. In the conventional circuit, when the result of an arithmetic                                 
                 operation is zero, the arithmetic section outputs selector control signals to                           
                 the multiplexers 222 and 224 for selecting the eight ‘0’ bits for the exponent                          
                 and twenty-three ‘0’ bits for the magnitude. (col. 3, ll. 66-67, and col. 4,                            
                 ll. 1-4).                                                                                               
                        10. FIG. 3 shows a conventional detector 24 or 26.  As shown, the                                
                 detector 24 or 26 includes two comparator circuits 252 and 254. (Col. 4,                                
                 ll. 24-26).                                                                                             
                        11. In the conventional circuit, three AND gates 261, 262 and 263                                
                 are also provided.  The AND gate 261 receives as inputs the logic bits                                  
                 outputted on the lines 255 and 257.  The AND gate 261 therefore outputs a                               
                 signal indicating whether or not the operand represents a zero valued special                           
                 operand. (Col. 4, ll. 41-45).                                                                           
                        12. The prior art Lynch patent describes that the “FPU [floating                                 
                 point unit] core uses the tag value associated with an operand to determine                             
                 whether the tag value is a special floating point number.”  (Col. 16,                                   
                 ll. 62-65).                                                                                             

                                               PRINCIPLES OF LAW                                                         
                        On appeal, Appellant bears the burden of showing that the Examiner                               
                 has not established a legally sufficient basis for anticipation based on the                            
                 Huang patent.                                                                                           
                        Appellant may sustain this burden by showing that the prior art                                  
                 reference relied upon by the Examiner fails to disclose an element of the                               
                 claim.  It is axiomatic that anticipation of a claim under § 102 can be found                           

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