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公开(公告)号：US1636762A
公开(公告)日：1927-07-26
申请号：US9274326
申请日：1926-03-06
Applicant: WILLIAMSON PEARL H , WILLIAMSON FLOYD M
Inventor： WILLIAMSON PEARL H , WILLIAMSON FLOYD M
IPC: E06B3/50
CPC classification number: E06B3/5063 , E06B3/50
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