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					| Patent    D805213 |  
					| Priority Sep 12 2012 |  
					| Filed Jul 21 2015 |  
					| Issued Dec 12 2017 |  
					| Expiry Dec 12 2032 |  
					|  |  
					| Assg.orig |  
					|  |  
					| Entity unknown |  
					 | 0 |  
					 | 40 |  
					 | 
						  n/a |  
						 
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			  I claim the ornamental design for a rail base, as shown and described. | 
 
	
FIG. 1 is a perspective view of a rail base.
FIG. 2 is a top view of the FIG. 1 rail base.
FIG. 3 is a bottom view of the FIG. 1 rail base; and,
FIG. 4 is a side view of the FIG. 1 rail base.
The broken lines in the drawing depict portions of the rail base that form no part of the claimed design.
	
	Deering, Bradley E.
	
	
	  
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