Direct fired air heating furnace with multiple tube wall heat exchange structure
United States Patent 2618256
US Patent References:
/0223450.html
- - 0223450
/0308073.html
- - 0308073
/0622278.html
- - 0622278
Direct-fired unit heater
- - 2376140
Air heating furnace
- - 2399690
/0223450.html
- - 0223450
/0308073.html
- - 0308073
/0622278.html
- - 0622278
Direct-fired unit heater
- - 2376140
Air heating furnace
- - 2399690
Inventors:
Olson, Arthur A.
Publication Date:
11/18/1952
View Patent Images:
Export Citation:
Assignee:
ARTHUR A OLSON & COMPANY
Primary Class:
Other Classes:
165/177, 126/109
International Classes:
F24H3/08; F24H3/02
Foreign References:
| FR867250A |