USD252500SExpiredUtility

Leveling instrument

20
Individually held — no corporate assignee on recordPriority: Sep 7, 1977Filed: Sep 7, 1977Granted: Jul 31, 1979
Est. expirySep 7, 1997(expired)· nominal 20-yr term from priority
Inventors:John F. Mason
20
PatentIndex Score
2
Cited by
3
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a leveling instrument, as shown.

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