Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Patent
1984-04-09
1987-04-28
Zarfas, Louis S.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Electrical property
D10 46, D10 75
Patent
active
D02895048
REFERENCES:
patent: D208193 (1967-08-01), Lang
patent: D217289 (1970-04-01), Andreaggi
patent: D274315 (1984-06-01), Hannah
patent: D279187 (1985-06-01), Tsumura et al.
Electronics, 12/7/1978, p. 159-Keithley model 642 Electrometer.
B & K Precision Test Equipment 1976 catalog, p. 17-Model 282 Multimeter.
King Indle G.
McCain George L.
Hauptman Benjamin J.
Ishimaru Mikio
John Fluke Mfg. Co. Inc.
Zarfas Louis S,.
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