Illuminated level

Details Illuminated level Illuminated level

1988-09-26

1991-07-23

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

Patent

active

D03184340

REFERENCES:
patent: D222722 (1971-12-01), Ostrager
patent: D280185 (1985-08-01), Wright
patent: 1818843 (1931-08-01), Dill
patent: 2720709 (1955-10-01), Stankawitz
patent: 3114507 (1963-12-01), Dommen
patent: 3192375 (1965-06-01), Olson
patent: 3603000 (1971-09-01), Ostrager
patent: 4506450 (1985-03-01), Fleming et al.
patent: 4543731 (1985-10-01), Boundy
patent: 4590680 (1986-05-01), Hanchett et al.
Exact Consumer Cat., No. 976, 9/76, Cover.

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