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					| Patent    D757521 |  
					| Priority Sep 30 2014 |  
					| Filed Sep 30 2014 |  
					| Issued May 31 2016 |  
					| Expiry May 31 2030 |  
					|  |  
					| Assg.orig |  
					|  |  
					| Entity unknown |  
					 | 18 |  
					 | 34 |  
					 | 
						  n/a |  
						 
    |  |  | 
			  
			  
			  
			  
			  I claim the ornamental design for a joist support, as shown and described. | 
 
	
FIG. 1 is a perspective view of a joist support.
FIG. 2 is a front elevation view of a joist support.
FIG. 3 is a bottom view of a joist support.
FIG. 4 is a side elevation view of a joist support.
FIG. 5 is a rear elevation view of a joist support.
FIG. 6 is a top view of a joist support; and,
FIG. 7 is an opposed side elevation view of a joist support.
	
	Rosner, Oscar
	
	
	  
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