Measuring – testing – or signalling instruments – Security or signal instrument or casing – Aural – i.e. – audible
Patent
1984-07-26
1986-06-10
Bullock, B. J.
Measuring, testing, or signalling instruments
Security or signal instrument or casing
Aural, i.e., audible
Patent
active
D02841738
REFERENCES:
patent: D235722 (1975-07-01), Rettick
patent: D248711 (1978-08-01), Tougas et al.
patent: D250638 (1978-12-01), Donnelly
patent: D264196 (1982-05-01), Doggart
patent: D274992 (1984-08-01), Levin
patent: 2112779 (1938-03-01), Katz
patent: 2205918 (1940-06-01), Bangs
Bullock B. J.
Gitlin Suzanne N.
Litchfield Stephen A.
Square D Company
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