Automatic ventilating shutter
United States Patent 2594944
US Patent References:
/0158630.html
- - 0158630

Remote-control mechanism
- - 1424410

Conditioning apparatus
- - 2060289

Louver construction
- - 2061162

Adjustable register
- - 2103982


Inventors:
Lohman Jr., William J.
Publication Date:
04/29/1952
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Assignee:
CHELSEA PRODUCTS INC
Primary Class:
454/352
Other Classes:
454/354, 454/353
International Classes:
F24F13/15
US Patent References:
2135810Register
2191774Attic ventilation
2295239Exhaust fan damper operating auxiliary
2314003Counterbalanced louver construction
2323178Ventilating unit
2355412Ventilator shutter
Foreign References:
GB190412742A
DE574975C