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公开(公告)号：US2526616A
公开(公告)日：1950-10-24
申请号：US9349449
申请日：1949-05-16
Applicant: CALKINS BRIGGS MARTIN
Inventor： CALKINS BRIGGS MARTIN
IPC: E05F5/02
CPC classification number: E05F1/1066 , E05F5/02 , E05Y2201/488 , Y10T16/27 , Y10T16/615
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