Immersion heater for bituminous materials and the like
United States Patent 2185594

Inventors:
Kittel, George P.
Publication Date:
01/02/1940
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Assignee:
Kittel, George P.
Primary Class:
126/376.100
Other Classes:
126/343.50A
International Classes:
B29B13/02; C10C3/12; B29B13/00; C10C3/00