USD271671SExpiredUtility

Smoke detector

72
Assignee: AMERICAN DISTR TELEGRAPH COMPANYPriority: Nov 9, 1981Filed: Nov 9, 1981Granted: Dec 6, 1983
Est. expiryNov 9, 2001(expired)· nominal 20-yr term from priority
Inventors:Hugh P. Thornton, Jr.
72
PatentIndex Score
14
Cited by
3
References
1
Claims

Claims

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

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