Combination foldable ruler and level

Details Combination foldable ruler and level Combination foldable ruler and level

1991-07-01

1993-03-16

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D10 71, D10 69

Patent

active

D03339912

REFERENCES:
patent: D286646 (1986-11-01), Mori
patent: 4194295 (1980-03-01), Simoro et al.
patent: 4241510 (1980-12-01), Radedei
patent: 4426790 (1984-01-01), Kimel
patent: 4524527 (1985-06-01), Jeffrey
patent: 4813149 (1989-03-01), Heckimer
patent: 5119565 (1992-06-01), Horvath et al.

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