Title:
Automatic ventilators
United States Patent 2975975
US Patent References:
Method of and apparatus for heating multiapartment buildings
- - 1832462
Thermostatic valve device
- - 2062937
Heating system
- - 2284674
Roof ventilator
- - 2551965
Shutter mounting for engine cooling systems
- - 2664862
Method of and apparatus for heating multiapartment buildings
- - 1832462
Thermostatic valve device
- - 2062937
Heating system
- - 2284674
Roof ventilator
- - 2551965
Shutter mounting for engine cooling systems
- - 2664862
Inventors:
Weber, Erwin L.
Publication Date:
03/21/1961
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Export Citation:
Assignee:
Weber, Erwin L.
Primary Class:
Other Classes:
236/93R
International Classes:
F24F11/02; F24F11/053; F24F11/04