Electric heater assembly

Electric heating – Heating devices – With heating unit structure

Reexamination Certificate

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Details

C338S225000, C219S553000

Reexamination Certificate

active

06872924

ABSTRACT:
An electric assembly using powdered media for generating heat.

REFERENCES:
patent: 389729 (1888-09-01), Weist
patent: 412449 (1889-10-01), Askew
patent: 527324 (1894-10-01), Davis
patent: 543800 (1895-07-01), Davis
patent: 1086726 (1914-02-01), Opsahl
patent: 1263181 (1918-04-01), Winger
patent: 1338294 (1920-04-01), Gardner
patent: 1473107 (1923-11-01), Kohn
patent: 1610820 (1926-12-01), Steward et al.
patent: 1681736 (1928-08-01), Kull
patent: 1947692 (1934-02-01), Beyer
patent: 2905919 (1959-09-01), Lorch et al.
patent: 5850073 (1998-12-01), Eckert

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