Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Patent
1979-05-08
1981-09-08
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Electrical property
D10103, D1004
Patent
active
D02606194
REFERENCES:
patent: D212124 (1968-08-01), Feldman
patent: D246956 (1978-01-01), Perry
patent: 2575279 (1951-11-01), Linton
patent: 2632785 (1953-03-01), Knopp
patent: 3265969 (1966-08-01), Catu
patent: 3934195 (1976-01-01), Shires
patent: 4041380 (1977-08-01), Epstein
Wahl (Flyer) Probe at bottom of front cover.
Radio Amateurs Journal, 8/47, p. 7, Ohmeter.
Holtje Nelson C.
Smith, Jr. John C.
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