Hardness testing block

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Information

Patent Grant
D304427

References
Source

Patent Number
D304,427
Date Filed
Friday, October 31, 1986
38 years ago
Date Issued
Tuesday, November 7, 1989
35 years ago

Inventors
- Ernest Biddle
Original Assignees
- KING TESTER CORPORATION
Examiners
- Holtje; Nelson C.

US Classifications
- D10 - Measuring, testing, or signalling instruments
Field of Search
- US
- D10 83
- D10 46
- 073 78
- 073 81
- Term of Grant
  14Years

Information

Abstract

Description

Claims

The ornamental design for a hardness testing block, as shown.

US Referenced Citations (3)

Number	Name	Date	Kind
D215069	Chriss	Aug 1969
D283599	Biddle et al.	Apr 1986
3352148	Johnson	Nov 1967