Combination calculator and tape rule

Details Combination calculator and tape rule Combination calculator and tape rule

1990-03-09

1993-04-27

Douglas, Alan P.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

Patent

active

D03350916

REFERENCES:
patent: D186623 (1959-11-01), Schwartz
patent: D219065 (1990-10-01), Zelnick
patent: D228202 (1973-08-01), Quenot
patent: D286861 (1986-11-01), Hollinger
patent: D295504 (1988-05-01), Yamamoto et al.
patent: 4181959 (1980-01-01), Tateishi
patent: 4181960 (1980-01-01), Tateishi
patent: 4551847 (1985-11-01), Caldwell
patent: 4766673 (1988-08-01), Bolson
patent: 5027526 (1991-07-01), Crane

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