Boiler insulation
United States Patent 2175948
Inventors:
Adams, James W.
Publication Date:
10/10/1939
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Export Citation:
Assignee:
OIL WELL SUPPLY CO
Primary Class:
Other Classes:
220/DIG.009, 428/121, 112/423, 112/420
International Classes:
F22B37/36; F22B37/00