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公开(公告)号：US1539386A
公开(公告)日：1925-05-26
申请号：US45369321
申请日：1921-03-19
Applicant: ANCHOR COMPANY
Inventor： FEENEY MICHAEL W
IPC: E01B13/02
CPC classification number: E01B13/02 , E01B2201/02 , E01B2201/04
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