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					| Patent    D689996 |  
					| Priority Aug 15 2011 |  
					| Filed Aug 15 2011 |  
					| Issued Sep 17 2013 |  
					| Expiry Sep 17 2027 |  
					|  |  
					| Assg.orig |  
					|  |  
					| Entity unknown |  
					 | 1 |  
					 | 13 |  
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			  The ornamental design for an air filter, as shown and described. | 
 
	
FIG. 1 is a perspective view of an air filter, showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
	
	Saunders, III, Robert G.
	
	
	  
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 	  	 | Patent | Priority | Assignee | Title | 
	      
	 | 4099047, | Nov 19 1976 |  | Commode ventilation system | 
    
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	 | 5403548, | Feb 28 1992 | JAPAN ENVIROCHEMICALS, LTD | Activated carbon adsorbent and applications thereof | 
    
	 | 5522093, | Sep 29 1994 |  | Toilet ventilation system | 
    
	 | 5829066, | Nov 19 1990 | Takeda Chemical Industries, Ltd. | Deodorizing apparatus and a toilet provided with the apparatus | 
    
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