USD319883SExpiredUtility

Ring for a manhole cover

37
Assignee: UNIVERSAL VALVE COMPANY INCPriority: Oct 12, 1988Filed: Oct 12, 1988Granted: Sep 10, 1991
Est. expiryOct 12, 2008(expired)· nominal 20-yr term from priority
Inventors:Martin C. PetteschRobert O. Andreasen
37
PatentIndex Score
4
Cited by
5
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a ring for a manhole cover, as shown and described.

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