USD279872SExpiredUtility

Photoelectric smoke detector

81
Assignee: AMERICAN DISTR TELEGRAPH COMPANYPriority: Aug 22, 1983Filed: Aug 22, 1983Granted: Jul 30, 1985
Est. expiryAug 22, 2003(expired)· nominal 20-yr term from priority
Inventors:Hugh P. Thornton, Jr.Robert B. Powers
81
PatentIndex Score
19
Cited by
3
References
1
Claims

Claims

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

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