USD312713SExpiredUtility
Plumbing cleanout device
Individually held — no corporate assignee on recordPriority: Mar 17, 1988Filed: Mar 17, 1988Granted: Dec 4, 1990
Est. expiryMar 17, 2008(expired)· nominal 20-yr term from priority
Inventors:Aaron Levine
60
PatentIndex Score
9
Cited by
6
References
1
Claims
Claims
exact text as granted — not AI-modifiedThe ornamental design for a plumbing cleanout device, as shown.
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