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Patent
   D722900
Priority
Nov 04 2013
Filed
Nov 04 2013
Issued
Feb 24 2015
Expiry
Feb 24 2029
Inventors
Biddle, Er…
Assg.orig
King Teste…
Assg.curr
King Teste…
Entity
unknown
Referenced by
3
References
11
Maint.:
n/a
The ornamental design for a metal hardness test block having an alphanumeric platted grid, as shown.

FIG. 1 is an isometric view showing the top, left end, and front of the metal hardness test block having an alphanumeric platted grid.

FIG. 2 is a top plan view of the metal hardness test block having an alphanumeric platted grid.

FIG. 3 is a bottom view of the metal hardness test block having an alphanumeric platted grid.

FIG. 4 is a left end view of the metal hardness test block having an alphanumeric platted grid.

FIG. 5 is a right end view of the metal hardness test block having an alphanumeric platted grid.

FIG. 6 is a front view of the metal hardness test block having an alphanumeric platted grid; and,

FIG. 7 is a rear view of the metal hardness tester block having an alphanumeric platted grid.
INVENTORS:

Biddle, Ernest L.

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
D789816, Dec 22 2015 King Tester Corporation Metal hardness test block with alphanumeric grid and circular targets with cross hairs
D790378, Dec 22 2015 King Tester Corporation Metal hardness test block with circular targets connected by alphanumeric grid lines
D797588, Dec 22 2015 King Tester Corporation Metal hardness test block with targets spaced from alphanumeric grid lines
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
3352148,
4275966, Jan 18 1979 Method and apparatus for the measurement of hardness testing indentations
5505094, Feb 07 1995 Armament Systems and Procedures, Inc. Test block for handcuff key and method of using same
6581446, Apr 13 1999 The University of Houston Determination of adhesion strength of HVOF coating by spherical indentation
20080072656,
20110041627,
20110136239,
D304427, Oct 31 1986 King Tester Corporation Hardness testing block
D611855, Oct 20 2008 ALPS ALPINE CO , LTD Pressure sensor
D689388, Apr 12 2013 Bertec Corporation Dual force plate
D689389, Apr 12 2013 Bertec Corporation Dual force plate
ASSIGNMENT RECORDS    Assignment records on the USPTO
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Nov 04 2013King Tester Corporation(assignment on the face of the patent)
Nov 20 2013BIDDLE, ERNEST L King Tester CorporationASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0316510905 pdf
MAINTENANCE FEES AND DATES:    Maintenance records on the USPTO
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