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3777693
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Information
Patent Grant
3777693
References
Source
Patent Number
3,777,693
Date Filed
Not available
Date Issued
Tuesday, December 11, 1973
50 years ago
CPC
B63B19/00 - Arrangements or adaptations of ports, doors, windows, port-holes, or other openings or covers
E06B1/08 - composed of several parts with respect to the cross-section of the frame itself
US Classifications
114 - Ships
049 - Movable or removable closures
052 - Static structures
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