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公开(公告)号：US2019947A
公开(公告)日：1935-11-05
申请号：US73294134
申请日：1934-06-28
Applicant: FRANKLIN LEE ALLEN
Inventor： ALLEN JOHN G
IPC: A47C21/02
CPC classification number: A47C21/022 , Y10T24/23
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