Steam heating system
United States Patent 3210005

Inventors:
Arnold, George D.
Publication Date:
10/05/1965
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Assignee:
DEWEY SHEPARD BOILER CO INC
Primary Class:
Other Classes:
237/67, 392/401, 392/358
International Classes:
F24H3/00; F28D1/02
US Patent References:
2197298Unitary water heater
Foreign References:
DE888606C