Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Patent
1986-03-26
1989-03-07
Holtje, Nelson O.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Electrical property
D10 78, D10102
Patent
active
D03001237
REFERENCES:
patent: D124210 (1940-12-01), Soderberg
patent: D191581 (1961-10-01), Scharfenberg
patent: D293895 (1988-01-01), Gustafsson
Simpson Cat. #5500-TE-p. 45-Model 1699 Milliohmeter.
Biddle Bulletin #27-80A-2/1/80-Back Cover-Major Megger-Insulation Tester.
Friend Terence M.
Hopper Ralph
Nichols Peter G.
Steggall Christopher L.
Holtje Nelson O.
Thorn EMI Instruments Limited
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