Central thermostat

Details Central thermostat Central thermostat

1987-09-21

1990-07-17

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Regulator or control

Patent

active

D03092682

REFERENCES:
patent: D248455 (1978-07-01), Cunnie
patent: D264189 (1982-05-01), Crawford et al.
patent: D268252 (1983-03-01), Chambers
patent: D273466 (1984-04-01), Lawrence et al.
patent: D297419 (1988-08-01), Bonnema et al.
patent: D301119 (1989-05-01), Arnott
patent: 4316256 (1982-02-01), Hendricks et al.
patent: 4319711 (1982-03-01), Barker et al.
patent: 4557317 (1985-12-01), Harmon, Jr.

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