USD258943SExpiredUtility

Smoke detector

58
Assignee: ELECTRONIC SECURITY SYSTEMS INCPriority: Apr 4, 1978Filed: Apr 4, 1978Granted: Apr 21, 1981
Est. expiryApr 4, 1998(expired)· nominal 20-yr term from priority
Inventors:William Ng
58
PatentIndex Score
7
Cited by
3
References
1
Claims

Claims

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

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