Plumb light

Details Plumb light Plumb light

1992-04-30

1993-11-02

Douglas, Alan P.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

Patent

active

D03408736

REFERENCES:
patent: D198470 (1964-06-01), Prutch
patent: 3354549 (1967-11-01), Fisher
patent: 3448525 (1969-06-01), Majewski
patent: 3505739 (1970-04-01), Abrams
patent: 3683510 (1972-08-01), Gros
patent: 3720001 (1973-03-01), Majewski
patent: 3909952 (1975-10-01), Lagasse
patent: 4206550 (1980-06-01), Boyett
patent: 4335522 (1982-06-01), Canfield
patent: 4597186 (1986-07-01), Markos
patent: 4625428 (1986-12-01), Griffin

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