Electric test pen

Details Electric test pen Electric test pen

1992-02-20

1994-05-24

Douglas, Alan P.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Electrical property

Patent

active

D03471870

REFERENCES:
patent: D212124 (1968-08-01), Feldman
patent: D251548 (1979-04-01), Perry
patent: D260619 (1981-09-01), Koslar
patent: 4491788 (1985-01-01), Zandonatti
patent: 5032787 (1991-07-01), Johnston et al.
patent: 5103165 (1992-04-01), Sirattz
patent: 5136237 (1992-08-01), Smith et al.
patent: 5235268 (1993-08-01), Harthrock

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