Metal hardness test block with circular targets connected by alphanumeric grid lines
Claims
I claim the ornamental design for a metal hardness test block with circular targets connected by alphanumeric grid lines, as shown in the accompanying drawings.
D304427 | November 7, 1989 | Biddle |
5505094 | April 9, 1996 | Parsons |
D611855 | March 16, 2010 | Minagawa |
D689388 | September 10, 2013 | Berme |
D689389 | September 10, 2013 | Berme |
D722900 | February 24, 2015 | Biddle |
20080072656 | March 27, 2008 | Conner |
20110136239 | June 9, 2011 | Hehn |
Type: Grant
Filed: Dec 22, 2015
Date of Patent: Jun 27, 2017
Inventor: William O. Knight (Malvern, PA)
Primary Examiner: Antoine D Davis
Application Number: 29/549,381