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公开(公告)号：US1679813A
公开(公告)日：1928-08-07
申请号：US11004626
申请日：1926-05-19
Applicant: PROSPERITY CO INC
Inventor： CHRIST SERVATIUS R , BRAUN PHILIP N
IPC: D06F71/40
CPC classification number: D06F71/40
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