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1581816
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Information
Patent Grant
1581816
References
Source
Patent Number
1,581,816
Date Filed
Not available
Date Issued
Tuesday, April 20, 1926
98 years ago
CPC
E05D15/1021 - involving movement in a third direction
F16F1/18 - Leaf springs
E05D2015/1036 - the arms being movable in vertical
E05Y2900/132 - Doors
Y10T16/3816 - Door elevating
US Classifications
414 - Material or article handling
016 - Miscellaneous hardware
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