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					| Patent    D276077 |  
					| Priority Sep 29 1982 |  
					| Filed Sep 29 1982 |  
					| Issued Oct 23 1984 |  
					| Expiry Oct 23 1998 |  
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					| Assg.orig |  
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					| Entity unknown |  
					 | 3 |  
					 | 2 |  
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			  The ornamental design for a building block, as shown. | 
 
	
FIG. 1 is an isometric view of a building block according to the invention;
FIG. 2 is a side elevation of a building block according to the invention;
FIG. 3 is a top plan view of a building block according to the invention;
and
FIG. 4 is an end elevation of a building block according to the invention.
	
	Rassias, John N., Clark, Cecily M.
	
	
	
	
	
	
	  
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