USD331204SExpiredUtility

Portable telephone auxiliary tone ringer and door alarm

53
Assignee: HAMPF JANPriority: Oct 31, 1989Filed: Apr 25, 1990Granted: Nov 24, 1992
Est. expiryOct 31, 2009(expired)· nominal 20-yr term from priority
Inventors:Jan Hampf
53
PatentIndex Score
8
Cited by
6
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a portable telephone auxiliary tone ringer and door alarm, as shown and described.

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