Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Patent
1979-07-05
1982-02-16
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Electrical property
D1004
Patent
active
D02630338
REFERENCES:
patent: D183879 (1958-11-01), Emerson
patent: 2732491 (1956-01-01), Jeannot
patent: 4081022 (1978-03-01), Wester
Heathkit Christmas 1979 Cat. #847, p. 59, Test Instruments at top left and bottom right.
Holtje Nelson C.
Udell Walter B.
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