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2766859
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Information
Patent Grant
2766859
References
Source
Patent Number
2,766,859
Date Filed
Not available
Date Issued
Tuesday, October 16, 1956
68 years ago
CPC
E04D13/0351 - the parts pivoting about a fixed axis
F24F7/02 - Roof ventilation
F24F2011/0097 - opening air passage in case of fire, excessive heat or smoke
US Classifications
049 - Movable or removable closures
052 - Static structures
454 - Ventilation
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