Combined portable compass and thermometer

Details Combined portable compass and thermometer Combined portable compass and thermometer

1986-05-02

1989-09-12

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D10 57

Patent

active

D03033570

REFERENCES:
patent: D150298 (1948-07-01), Johanson
patent: D242437 (1976-11-01), Kramer
patent: D273847 (1984-05-01), Yusa
patent: D290093 (1987-06-01), Kramer
patent: D297515 (1988-09-01), Yusa
patent: 1201332 (1916-10-01), Myers
patent: 1479008 (1924-01-01), Powers
patent: 1952307 (1934-03-01), Boucher
patent: 2924364 (1960-02-01), Raguse
patent: 4741627 (1988-05-01), Fukui

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