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					| Patent    D766641 |  
					| Priority Jul 14 2014 |  
					| Filed Jan 13 2015 |  
					| Issued Sep 20 2016 |  
					| Expiry Sep 20 2030 |  
					|  |  
					| Assg.orig |  
					|  |  
					| Entity unknown |  
					 | 7 |  
					 | 10 |  
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						  n/a |  
						 
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			  The ornamental design for a chair back, as shown and described. | 
 
	
FIG. 1 is a front perspective view of a chair back my new design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof, the right side being a mirror image; and,
FIG. 6 is a top plan view thereof.
	
	Gorgi, Claudio
	
	
	  
 	  	 | Patent | Priority | Assignee | Title | 
	      
	 | D823015, | Jul 21 2017 | HOMY CASA LIMITED | Chair | 
    
	 | D823016, | Jul 21 2017 | HOMY CASA LIMITED | Chair | 
    
	 | D826614, | May 26 2017 | Hongliang, Chu | Back rest for chair | 
    
	 | D891809, | May 03 2019 | AMQ Solutions, LLC | Chair | 
    
	 | D910358, | Dec 25 2018 | Anji Fuhe Furniture Co., Ltd. | Seat | 
    
	 | D919345, | Oct 11 2018 | Knoll, Inc. | Chair | 
    
	 | D988020, | Aug 19 2022 |  | Office chair | 
	
	
	
	  
 	  	 | Patent | Priority | Assignee | Title | 
	      
	 | 6955402, | May 22 2000 | HERMAN MILLER, INC | Office chair | 
    
	 | D604969, | Apr 09 2008 | Formway Furniture Limited | Chair back component | 
    
	 | D623449, | May 13 2005 | Humanscale Corporation | Mesh backrest for a chair | 
    
	 | D669713, | May 11 2012 |  | Chair back | 
    
	 | D677068, | Jul 28 2011 | Jianhua Yang, Foshan Nanhai Lainuo Furniture Co., Ltd. | Office chair | 
    
	 | D718544, | Mar 17 2014 | Chueng Shine Co., Ltd. | Chair | 
    
	 | D724879, | Sep 12 2014 | DONGGUAN KENTEC OFFICE SEATING CO , LTD | Chair back | 
    
	 | D727075, | Dec 05 2013 | ITOKI CORPORATION | Chair | 
    
	 | D755533, | Jan 29 2015 | BOSS DESIGN LIMITED | Armchair | 
    
	 | D756695, | Sep 29 2014 | Okamura Corporation | Chair | 
	
	
	
	
	
	  
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