USD250131SExpiredUtility

Breathing mask

Assignee: CHEMETRON CORPPriority: Oct 18, 1976Filed: Oct 18, 1976Granted: Oct 31, 1978

Est. expiryOct 18, 1996(expired)· nominal 20-yr term from priority

PatentIndex Score

268

Cited by

References

Claims

exact text as granted — not AI-modified

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

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