Measuring – testing – or signalling instruments – Security or signal instrument or casing – Aural – i.e. – audible
Patent
1983-08-22
1985-07-16
Bullock, B. J.
Measuring, testing, or signalling instruments
Security or signal instrument or casing
Aural, i.e., audible
D21 64
Patent
active
D02796589
REFERENCES:
patent: D178485 (1956-08-01), Bacon
patent: 194119 (1877-08-01), Arpisella
patent: 1014302 (1912-01-01), Hawley
patent: 2880548 (1959-04-01), Garr
The Sporting Dealer, 9/1972, all Game Callers on this p. 58.
Bullock B. J.
Gitlin Suzanne N.
Olive B. B.
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