USD274753SExpiredUtility

Middle ear ventilation tube

70
Individually held — no corporate assignee on recordPriority: Sep 24, 1982Filed: Sep 24, 1982Granted: Jul 17, 1984
Est. expirySep 24, 2002(expired)· nominal 20-yr term from priority
Inventors:Beverly W. Armstrong
70
PatentIndex Score
14
Cited by
18
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a middle ear ventilation tube, substantially as shown and described.

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