USD271144SExpiredUtility

Breathing gas mask

Assignee: USD CORPPriority: Jul 6, 1981Filed: Jul 6, 1981Granted: Oct 25, 1983

Est. expiryJul 6, 2001(expired)· nominal 20-yr term from priority

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Claims

exact text as granted — not AI-modified

The ornamental design for a breathing gas mask, as substantially shown.

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