USD261996SExpiredUtility

Levelling device

52
Assignee: MARTRONICS CORPPriority: Aug 13, 1979Filed: Aug 13, 1979Granted: Nov 24, 1981
Est. expiryAug 13, 1999(expired)· nominal 20-yr term from priority
Inventors:William Folwell Barton
52
PatentIndex Score
5
Cited by
7
References
1
Claims

Claims

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

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