Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Patent
1983-03-16
1986-09-16
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Electrical property
Patent
active
D02856638
REFERENCES:
patent: D247353 (1978-02-01), Kuramoto
patent: D261627 (1981-11-01), Kuramoto
patent: 2326909 (1943-08-01), Wolferz et al.
patent: 3465250 (1969-09-01), Schilling
Industrial Equipment News, 11/78, p. S-9, Clamp-On Multimeter, middle col., 2nd row.
Industrial Equipment News, 11/78, p. 102, Sound Level Meter, first col., top row.
Friend Terence M.
Nichols Peter G.
Steggall Christopher L.
Tedd David C.
Holtje Nelson C.
Pfeffer Terry
Thorn EMI Instruments Limited
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