Title:
Electrical heating device
United States Patent 3287684
US Patent References:
Surface heating element
- - 2314766

Warming pad
- - 2392712

Hygroscopic control device
- - 2543384

Humidity sensitive device
- - 2609688

Electrically conductive material
- - 2669646


Inventors:
Armbruster Jr., Albert
Publication Date:
11/22/1966
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Assignee:
MOTSON SERVICES INC
Primary Class:
338/211
Other Classes:
338/314, 219/543, 219/541, 392/435, 219/549
International Classes:
H05B3/06; H05B3/26; H05B3/22
US Patent References:
2682483Electrical heater and method of making same
2758256Electric circuit components
2765385Sintered photoconducting layers