Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Patent
1980-10-06
1983-03-08
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Electrical property
D1004
Patent
active
D02681730
REFERENCES:
patent: D249475 (1978-09-01), Turner
patent: D256896 (1980-09-01), Kuramoto
patent: 2875403 (1959-02-01), Gilbert
patent: 3622877 (1971-11-01), MacDavid
patent: 3701016 (1972-10-01), Bennett
North American Bulletin, 80.10-8/79-"Tech-Mate" Digital Calibrator.
Radio-Electronics-6/60, p. 100-Transfer Standard Calibrator.
Durdin Daniel J.
Guetschow Robert A.
Holtje Nelson C.
Rosemount Inc.
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