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公开(公告)号：US1686619A
公开(公告)日：1928-10-09
申请号：US8008126
申请日：1926-01-08
Applicant: PROSPERITY CO INC
Inventor： KILBY CHARLES B , MAURICE REINITZ , CLISSON ALBERT B
IPC: D06F71/40
CPC classification number: D06F71/40
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