USD269633SExpiredUtility

Check valve

79
Assignee: WILLINGER ALLAN HPriority: Sep 8, 1980Filed: Sep 8, 1980Granted: Jul 5, 1983
Est. expirySep 8, 2000(expired)· nominal 20-yr term from priority
Inventors:Allan H. WillingerTsuyoshi Itakura
79
PatentIndex Score
16
Cited by
4
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a check valve, substantially as shown.

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