USD243513SExpiredUtility

Intrusion alarm

69
Assignee: AMERICAN DISTR TELEGRAPH COMPANYPriority: Feb 12, 1976Filed: Feb 12, 1976Granted: Mar 1, 1977
Est. expiryFeb 12, 1996(expired)· nominal 20-yr term from priority
Inventors:Aaron A. GalvinFrancis R. Keeler
69
PatentIndex Score
10
Cited by
2
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for an intrusion alarm, as shown.

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