USD258577SExpiredUtility

Signalling device

94
Assignee: GTE PROD CORPPriority: Dec 4, 1978Filed: Dec 4, 1978Granted: Mar 17, 1981
Est. expiryDec 4, 1998(expired)· nominal 20-yr term from priority
Inventors:Alfred I. Bottner
94
PatentIndex Score
80
Cited by
1
References
1
Claims

Claims

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

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