Drawing instrument

Details Drawing instrument Drawing instrument

1977-07-15

1980-01-08

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D1004

Patent

active

D02538750

REFERENCES:
patent: D167432 (1952-08-01), Turner
patent: D186283 (1959-10-01), Lannon
patent: 1964197 (1934-06-01), Edison
patent: 3945123 (1976-03-01), Tortorici

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