Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Patent
1985-10-15
1989-01-17
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Electrical property
D10 46
Patent
active
D02994399
REFERENCES:
patent: D224319 (1972-07-01), Sylvester
patent: D238562 (1976-01-01), Sylvester
patent: D256566 (1980-08-01), Zephir
patent: D256895 (1980-09-01), LeBlanc
patent: D268172 (1983-03-01), Chirkov
patent: D280804 (1985-10-01), Hardy
Design News-5/21/73-p. 140, Impaet Analyzer at top-right.
Farquhar John A,
Farquhar Merrilyn J.
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