Measuring – testing – or signalling instruments – Security or signal instrument or casing – Alarm or control thereof
Patent
1989-10-06
1991-06-04
Burke, Wallace R.
Measuring, testing, or signalling instruments
Security or signal instrument or casing
Alarm or control thereof
Patent
active
D03172724
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patent: D297221 (1988-08-01), Podhrasky
patent: D307400 (1990-04-01), Armstrong et al.
patent: 4384281 (1983-05-01), Cooper
patent: 4795995 (1989-01-01), Ecclestan et al.
patent: 4845509 (1989-07-01), Asbrink
patent: 4972198 (1990-11-01), Feltz et al.
Belletire Steven P.
Foster Gregory J.
Rubertus Roland W.
Westerberg Roger K.
Zarembo Peter J.
Barte William B.
Burke Wallace R.
Jackson Marcus
Kirn Walter N.
Minnesota Mining and Manufacturing Company
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