USD357532SExpiredUtility

Face mask valve

64
Individually held — no corporate assignee on recordPriority: Oct 7, 1992Filed: Apr 7, 1993Granted: Apr 18, 1995
Est. expiryOct 7, 2012(expired)· nominal 20-yr term from priority
Inventors:Norma D. Mcculloch
64
PatentIndex Score
15
Cited by
24
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a face mask valve, as shown and described.

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