USD320473SExpiredUtility

Breathing mask

38
Assignee: NIPPON OXYGEN CO LTDPriority: Mar 31, 1989Filed: Sep 28, 1989Granted: Oct 1, 1991
Est. expiryMar 31, 2009(expired)· nominal 20-yr term from priority
Inventors:Kaori ManoNubuyuki Kitamura
38
PatentIndex Score
4
Cited by
3
References
1
Claims

Claims

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

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