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					| Patent    D588256 |  
					| Priority Jul 11 2008 |  
					| Filed Jul 11 2008 |  
					| Issued Mar 10 2009 |  
					| Expiry Mar 10 2023 |  
					|  |  
					| Assg.orig |  
					|  |  
					| Entity unknown |  
					 | 30 |  
					 | 4 |  
					 | 
						  n/a |  
						 
    |  |  | 
			  
			  The ornamental design for a roof field vent, as shown and described.    | 
 
	
FIG. 1 is a top, front, perspective view of a roof field vent showing our new design;
FIG. 2 is a top view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is an enlarged front view thereof;
FIG. 5 is an enlarged rear view thereof;
FIG. 6 is an enlarged side view thereof; and,
FIG. 7 is another side view thereof.
	
	Daniels, Gregory S.
	
	
	  
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