Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Patent
1988-01-21
1992-07-14
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Electrical property
D10 78
Patent
active
D03278522
REFERENCES:
patent: D197414 (1964-01-01), Erath
patent: D217101 (1970-04-01), Feldman
patent: D239007 (1976-03-01), Kato
patent: 4825392 (1989-04-01), Freeman
Hewlett Packard, Jul. 1965, info. sheet on model 414A.
Cole-Parmer Instrument Co., 1981-82, p. 57, Meter at bottom.
Cole-Parmer Instrument Co., 1981-82, p. 222, Meter at top.
Holtje Nelson C.
Watson Gary D.
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