Portable multimeter

Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property

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D10 75

Patent

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D02990148

REFERENCES:
patent: D258727 (1981-03-01), Swinstead
patent: D261488 (1981-10-01), Lindsay
patent: D280299 (1985-08-01), Nelson
patent: D282246 (1986-01-01), Thomas
patent: D282532 (1986-02-01), Brown
patent: D289504 (1987-04-01), McCain
Keithley Cat. 77-.COPYRGT.1976-p. 24-Dig. Electrometer at top.
Tektronix Cat. 9/77-p. 8-#851, Dig. Tester.
Weston Cat.-4/77-front cover-AC/DC Dig. Multimeter.

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