Concrete block

The ornamental design for a concrete block, as shown and described.

1. Concrete block

1.1 is a front elevation view of a concrete block showing my new design;

1.2 is a top plan view thereof;

1.3 is a left side elevation view thereof;

1.4 is a right side elevation view thereof;

1.5 is a bottom plan view thereof;

1.6 is a perspective view thereof; and

1.7 is a perspective view taken from an alternate position.

Patent	Priority	Assignee	Title
D340775,	Jul 24 1991	Newblock Corporation	Concrete block
D368313,	Oct 06 1994	SCHULZ, JOHN W , JR	Split face concrete block
D408557,	Feb 27 1998		Concrete block and brick
D408930,	Apr 27 1998		Concrete block and brick
D409313,	Feb 27 1998		Concrete block and brick
D509597,	Feb 24 2004		Construction concrete block
D574517,	Jun 20 2007		Insulated concrete block with knockouts
D602171,	Feb 05 2008	SCI MATERIALS	Concrete block
D776832,	Jun 12 2015		Concrete block
D783860,	Nov 29 2010	Anchor Wall Systems, Inc.	Molded surface of a concrete block
D783861,	Oct 21 2008	Anchor Wall Systems, Inc.	Molded surface of a concrete block

Executed on

Assignor

Assignee

Conveyance

Frame

Reel

Doc

n/a

Date	Maintenance Fee Events

n/a

Date	Maintenance Schedule