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					| Patent    D577520 |  
					| Priority Jun 28 2007 |  
					| Filed Feb 28 2008 |  
					| Issued Sep 30 2008 |  
					| Expiry Sep 30 2022 |  
					|  |  
					| Assg.orig |  
					|  |  
					| Entity unknown |  
					 | 5 |  
					 | 11 |  
					 | 
						  n/a |  
						 
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			  The ornamental design for a seat back, as shown and described. | 
 
	
FIG. 1 is an upper perspective view of the seat back showing my design.
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a side view thereof;
FIG. 5 is an opposite side view thereof;
FIG. 6 is top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is another upper perspective view of a second embodiment, the difference being a matter of length; and,
FIG. 9 is an upper perspective view thereof, showing attachment to a seat in broken lines.
The broken lines in FIG. 9 are presented for illustrative purposes only and for no part of the claimed design.
	
	Lee, Lawrence K.
	
	
	  
 	  	 | Patent | Priority | Assignee | Title | 
	      
	 | D658411, | Sep 15 2010 |  | Chair back | 
    
	 | D688076, | Apr 25 2012 |  | Bench back | 
    
	 | D709311, | Mar 15 2013 |  | Mesh gap slated seating folding chair back | 
    
	 | D778659, | May 22 2014 |  | Mesh gap chair slats | 
    
	 | D882976, | Apr 23 2018 |  | Chair | 
	
	
	
	  
 	  	 | Patent | Priority | Assignee | Title | 
	      
	 | 1691262, |  |  |  | 
    
	 | 2490884, |  |  |  | 
    
	 | 3873154, |  |  |  | 
    
	 | 109239, |  |  |  | 
    
	 | D252238, | Apr 25 1977 |  | Chair | 
    
	 | D319355, | Jun 01 1988 | FLEET CAPITAL CORPORATION, AS ADMINISTRATIVE AGENT | Chair frame | 
    
	 | D399064, | Aug 07 1997 |  | Glider | 
    
	 | D399065, | Aug 07 1997 |  | Glider | 
    
	 | D420824, | Apr 22 1999 |  | Chair | 
    
	 | D441976, | Jun 03 1999 | HNI TECHNOLOGIES INC | Chair | 
    
	 | D509966, | Jun 30 2003 | HHG IPCO, LLC | Rocking chair | 
	
	
	
	
	
	  
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