Title:
Automatic ventilating shutter
Document Type and Number:
United States Patent 2594944

Inventors:
Lohman Jr., William J.
Publication Date:
04/29/1952
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Referenced by:
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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:
0158630
1424410Remote-control mechanism
2060289Conditioning apparatus
2061162Louver construction
2103982Adjustable register
2135810Register
2191774Attic ventilation
2295239Exhaust fan damper operating auxiliary
2314003Counterbalanced louver construction
2323178Ventilating unit
2355412Ventilator shutter
Foreign References:
GB190412742A
DE574975C




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