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公开(公告)号：US1540386A
公开(公告)日：1925-06-02
申请号：US62936523
申请日：1923-04-02
Applicant: BRYAN GEORGE T
Inventor： BRYAN GEORGE T
IPC: D06F37/36
CPC classification number: D06F37/36 , D06F2700/05 , Y10T74/18504 , Y10T74/19186
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