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					| Patent    D600821 |  
					| Priority May 21 2007 |  
					| Filed Nov 21 2007 |  
					| Issued Sep 22 2009 |  
					| Expiry Sep 22 2023 |  
					|  |  
					| Assg.orig |  
					|  |  
					| Entity unknown |  
					 | 11 |  
					 | 7 |  
					 | 
						  n/a |  
						 
    |  |  | 
			  
			  The ornamental design for a construction block, as shown and described. | 
 
	
FIG. 1 is a top perspective view of a construction block;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a side elevational view thereof, the other side being identical to the shown side;
FIG. 7 is a top perspective view of the design in assembled condition to form a wall; and,
FIG. 8 is a top perspective view of the design in an assembled condition different from that shown in FIG. 7.
The broken line showing of the other construction blocks in FIGS. 7 and 8 is environmental subject matter and forms no part of the claimed design.
	
	Esterhuizen, André 
	
	
	  
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