USD270957SExpiredUtility

Respirator

57
Assignee: AMERICAN OPTICAL CORPPriority: Nov 8, 1982Filed: Nov 8, 1982Granted: Oct 11, 1983
Est. expiryNov 8, 2002(expired)· nominal 20-yr term from priority
Inventors:Richard D. MaryyanekJoseph Z. Zdrok
57
PatentIndex Score
6
Cited by
6
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a respirator, as shown.

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