Tetrahedral turbine block

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

FIG. 1 is a perspective view of a tetrahedral turbine block, showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a back elevation view thereof;

FIG. 6 is a left side elevation view thereof; and,

FIG. 7 is a right side elevation view thereof.

The shading shown is indicative of surface contour and not surface ornamentation.

Patent	Priority	Assignee	Title
D798391,	Mar 26 2014	T. Dashon, Howard	Pentagonal building block
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D849852,	Mar 30 2018		Pentagonal turbine block
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D906439,	Apr 30 2018		Tetrahedral icosahedron block
D939636,	Mar 16 2018		Block formed from mirrored pair of sheet-formed tetrahedral units
D968521,	Apr 30 2018	T. Dashon, Howard	Separable tetrahedral icosahedron block

Patent	Priority	Assignee	Title
3562077,
5036635,	Aug 24 1987		Building system using saddle zonogons and saddle zonohedra
5448868,	Oct 21 1992	General Electric Company; Electric Power Research Institute, Inc	Periodic space structures composed of two nodal polyhedra for design applications
5593337,	Jan 11 1996		Flexible toy piece set for assembly into polyhedral shapes
5628666,	Feb 02 1995	WELLS FARGO BANK, N A	Toy building chip
5762336,	Jun 16 1997		Three dimensional interlocking puzzle
6059631,	Sep 08 1998		Toy construction kit with interconnecting building pieces
6152797,	Feb 16 1995		Interconnectable space filling model
6379212,	Mar 13 1998		System and set of intercleaving dichotomized polyhedral elements and extensions
6558065,	Jul 09 2001		Geometric construction system
6921314,	Mar 13 1998		Intercleaving spatially dichotomized polyhedral building blocks and extensions
7156392,	Jan 03 2005		Polyhedral puzzle
7469898,	Apr 05 2006		Geometric puzzle kits
8157608,	Aug 12 2006	STAPLETON, JONATHAN	One-piece polyhedral construction modules
8650808,	Jan 22 2010		Curved surface building modules
8845381,	Apr 21 2011	NOVATION DESIGN INC	Geometric construction module and system
8858232,	Oct 04 2011		Device to three-dimensionally display colors of a color model
8979608,	Jun 06 2011	Lo-Res Labs LLC	Folded block structure and method for making
9192875,	Sep 17 2013	T. Dashon, Howard	All-shape: modified platonic solid building block
CA159837,
D258743,	Jul 12 1977		Structural connector
D258744,	Aug 08 1977		Angled structural connector

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