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公开(公告)号：US1691677A
公开(公告)日：1928-11-13
申请号：US73582224
申请日：1924-09-04
Applicant: PROSPERITY CO INC
Inventor： SOCIA ALEXANDER J , DALY JOSEPH P
IPC: D06F71/04
CPC classification number: D06F71/046
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