Measuring – testing – or signalling instruments – Security or signal instrument or casing – Aural – i.e. – audible
Patent
1992-06-25
1993-11-30
Feifer, Melvin B.
Measuring, testing, or signalling instruments
Security or signal instrument or casing
Aural, i.e., audible
D11141, D17 99, 84404, 116141
Patent
active
D03417891
REFERENCES:
patent: D258809 (1981-04-01), Halburian
patent: D317419 (1991-06-01), Ronzheimer
patent: 864461 (1907-08-01), Gibbs
patent: 4237767 (1980-12-01), Levine
patent: 4967633 (1990-11-01), Jewell, Jr.
Aronovich Adir
Feifer Melvin B.
Mason, Jr. Joseph C.
Smith Ronald E.
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