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521993
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Information
Patent Grant
521993
References
Source
Patent Number
521,993
Date Filed
Not available
Date Issued
Tuesday, June 26, 1894
130 years ago
CPC
E05F3/108 - with piston rod protruding from the closer housing; Telescoping closers
Y10S70/50 - Time lock, fluid-controlled
Y10T16/276 - Liquid
US Classifications
016 - Miscellaneous hardware
049 - Movable or removable closures
070 - Locks
251 - Valves and valve actuation
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