USD394015SExpiredUtility

Hardness tester

66
Assignee: INSTRON CORPPriority: Mar 21, 1997Filed: Mar 21, 1997Granted: May 5, 1998
Est. expiryMar 21, 2017(expired)· nominal 20-yr term from priority
Inventors:Charles W. Kellstedt, Jr.Joel M. Lieblein
66
PatentIndex Score
14
Cited by
4
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a hardness tester, as shown and described.

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