Measuring – testing – or signalling instruments – Security or signal instrument or casing – Alarm or control thereof
Patent
1990-03-02
1993-08-31
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Security or signal instrument or casing
Alarm or control thereof
Patent
active
D03388450
REFERENCES:
patent: D198279 (1964-05-01), Karbo
patent: D200590 (1965-03-01), Van Steenhoven
patent: D323405 (1992-01-01), Kin
patent: 1915967 (1933-06-01), Bailey
patent: 4212050 (1980-07-01), Trenkler
patent: 4716402 (1987-12-01), Francis
Davis A. D.
Holtje Nelson C.
The Brinkmann & Corporation
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