Electric heating device
United States Patent 2607876

Inventors:
Bergen, Richard L.
Johnson, William B.
Publication Date:
08/19/1952
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Assignee:
Bergen, Richard L.
Johnson, William B.
Primary Class:
219/521
Other Classes:
219/415, 139/425R, 338/333, 219/531, 29/419.100, 219/549, 338/212, 219/535
International Classes:
A47J36/24; B01L7/00
US Patent References:
1855092Heating pad
1979954Method of manufacturing centrifuge buckets
2023264
2215042Heating pad
2231506Electrical heating device
2282078Electrical heating device
2419848Electrical heater and method of manufacturing it
2478267Composite products and methods of making the same