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					| Patent    D267743 |  
					| Priority Dec 15 1980 |  
					| Filed Dec 15 1980 |  
					| Issued Jan 25 1983 |  
					| Expiry Jan 25 1997 |  
					|  |  
					| Assg.orig |  
					|  |  
					| Entity unknown |  
					 | 13 |  
					 | 19 |  
					 | 
						  n/a |  
						 
    |  |  | 
			  
			  The ornamental design for a pressure diaphragm, as shown. | 
 
	
FIG. 1 is a perspective view of a pressure diaphragm showing our new
design;
FIG. 2 is an elevational view along the left side thereof;
FIG. 3 is a right end elevational view thereof; and
FIG. 4 is a bottom plan view thereof.
	
	Bucchianeri, Richard M., O'Leary, Stephen H., Cunningham, Joel N.
	
	
	  
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