Measuring – testing – or signalling instruments – Security or signal instrument or casing – Alarm or control thereof
Patent
1985-08-20
1988-09-06
Kemper, Catherine E.
Measuring, testing, or signalling instruments
Security or signal instrument or casing
Alarm or control thereof
D14 95
Patent
active
D02975181
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patent: D277465 (1985-02-01), MacDonald
patent: D278905 (1985-05-01), Scheid et al.
patent: D293088 (1987-12-01), Brown et al.
patent: 2710345 (1955-06-01), Stephens
patent: 4057794 (1977-11-01), Grossfield
patent: 4491970 (1985-01-01), La White et al.
John Manufacturing Limited
Kemper Catherine E.
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