Measuring – testing – or signalling instruments – Security or signal instrument or casing – Alarm or control thereof
Patent
1988-11-09
1990-11-13
Burke, Wallace R.
Measuring, testing, or signalling instruments
Security or signal instrument or casing
Alarm or control thereof
Patent
active
D03120538
REFERENCES:
patent: D189222 (1960-11-01), Aull
patent: D296531 (1988-07-01), Kotlicki et al.
Mountain West Alarm Supply Co., Date 1977 p. 74 upper middle of page (Infrared Beambreaker).
Jacobs Richard H.
Keagle Ronald T.
Peterson Gerald E.
Buckley R. Lawrence
Burke Wallace R.
Jackson Marcus
The Toro Company
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