Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Patent
1984-04-20
1986-12-23
Zarfas, Louis S.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Electrical property
Patent
active
D02873427
REFERENCES:
patent: D180844 (1957-08-01), Pollakoff
patent: D198025 (1964-04-01), Seabury, Jr. et al.
patent: D222941 (1972-02-01), Knutson
patent: D243960 (1977-04-01), Roch et al.
patent: 4438391 (1984-03-01), Rog et al.
Electronic Design 2, 1/18/1977, p. 30-Radiometer.
Kober Carl L.
Procter-Gregg H. David
Denver Mineral Exploration Corp.
Dorr Robert C.
Zarfas Louis S,.
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