Auxiliary air heater
United States Patent 2468909
US Patent References:
Humidifier
- - 1801057

Control for fuel economizers
- - 2362940


Inventors:
Cnossen, Andrew J.
Yeager, Evelyn M.
Publication Date:
05/03/1949
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Assignee:
Cnossen
Primary Class:
165/299
Other Classes:
126/110R, 165/179, 165/154, 165/901, 165/121, 237/55
International Classes:
F28D7/10; F28F1/40; F28F9/22; F28F1/10