Toy building block

The ornamental design for a toy building block, as shown.

FIG. 1 is a perspective view showing the front, right side and top of a toy building block showing my design;

FIG. 2 is a rear view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof.

Patent	Priority	Assignee	Title
6907703,	Apr 29 2003		Interlocking block
8731129,	Aug 10 2004	MITSUBISHI HEAVY INDUSTRIES, LTD	Cask buffer body
9706839,	Feb 11 2015	OLD NEW HOUSE LLC	Table structure
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D887500,	Feb 07 2018	FLYCATCHER CORP LTD	Toy block
D933756,	Sep 19 2017	MODU ApS	Building block from a toy building set
D948751,	Jun 04 2020	Vandenberg Brothers, Inc.	Erosion barrier
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ER3923,

Patent	Priority	Assignee	Title
4239231,	Jul 28 1978		Three-dimensional domino game
4602908,	Jan 03 1982		Toy building block set
D272255,	May 08 1978	Kawada Co., Ltd.	Toy block
D295641,	Nov 26 1986	Interlego A.G.	Toy building element
D311939,	May 09 1989	Interlego A.G.	Toy building element
D343426,	Jan 13 1992		Toy building block

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