|  
			 				  
					| PTO
                  Wrapper
						
						PDF |    
				  | Dossier
                
						Espace
						Google |  
				  |  |  
					| Patent    D641561 |  
					| Priority May 10 2010 |  
					| Filed May 10 2010 |  
					| Issued Jul 19 2011 |  
					| Expiry Jul 19 2025 |  
					|  |  
					| Assg.orig |  
					|  |  
					| Entity unknown |  
					 | 14 |  
					 | 7 |  
					 | 
						  n/a |  
						 
    |  |  | 
			  
			  The ornamental design for a chair frame, as shown and described. | 
 
	
FIG. 1 is a perspective view of a chair frame, 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 view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
	
	Tsai, Hsuan-Chin
	
	
	  
 	  	 | Patent | Priority | Assignee | Title | 
	      
	 | D654709, | Oct 09 2008 | Okamura Corporation | Chair | 
    
	 | D654710, | Oct 09 2008 | Okamura Corporation | Chair | 
    
	 | D654711, | Oct 09 2008 | Okamura Corporation | Chair | 
    
	 | D673401, | May 13 2005 | Humanscale Corporation | Chair support structure | 
    
	 | D673796, | Aug 25 2011 |  | Chair seat frame | 
    
	 | D741099, | Sep 26 2013 | Okamura Corporation | Chair | 
    
	 | D793143, | May 31 2016 | Zhongshan Shi Songlin Furniture Co., Ltd | Chair back frame | 
    
	 | D795622, | Jun 08 2016 | Humanscale Corporation | Chair back | 
    
	 | D807673, | Oct 01 2015 | ITOKI CORPORATION | Chair | 
    
	 | D863802, | Aug 31 2017 | Zhengxing Wang | Office chair | 
    
	 | D882317, | Jun 13 2016 | MILLERKNOLL, INC | Chair | 
    
	 | D905991, | May 27 2019 |  | Chair | 
    
	 | D911054, | Jun 21 2019 | NINGBO MEIYING HOUSEHOLD GROUP CO , LTD | Office chair | 
    
	 | ER6033, |  |  |  | 
	
	
	
	  
 	  	 | Patent | Priority | Assignee | Title | 
	      
	 | 7249802, | Feb 13 2002 | MILLERKNOLL, INC | Back support structure | 
    
	 | D471042, | Feb 13 2002 | HERMAN MILLER, INC | Back for a seating structure | 
    
	 | D471370, | Feb 13 2002 | HERMAN MILLER, INC | Task chair | 
    
	 | D490994, | Oct 15 2002 | HERMAN MILLER, INC | Task chair | 
    
	 | D494792, | Oct 15 2002 | HERMAN MILLER, INC | Back for a seating structure | 
    
	 | D575085, | Mar 30 2008 |  | Chair backrest | 
    
	 | D627983, | Nov 09 2009 | Kabushiki Kaisha Uchida Yoko | Chair | 
	
	
	
	
	
	  
	  	 | Date | Maintenance Fee Events | 
	  n/a
	
	
	
	  
	  	 | Date | Maintenance Schedule | 
	  n/a