Measuring – testing – or signalling instruments – Security or signal instrument or casing – Alarm or control thereof
Patent
1992-06-02
1993-11-30
Burke, Wallace R.
Measuring, testing, or signalling instruments
Security or signal instrument or casing
Alarm or control thereof
Patent
active
D03417875
REFERENCES:
patent: D312053 (1990-11-01), Jacobs et al.
patent: D335467 (1993-05-01), Cheng
patent: 5103346 (1992-04-01), Chang
Leviton passive infrared motion sensor on p. 43 of Electrical Construction & Maintainence Dec. 1989.
Ascentex Industry Corporation
Burke Wallace R.
Sincavage Joel
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