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公开(公告)号：US1937842A
公开(公告)日：1933-12-05
申请号：US60144432
申请日：1932-03-26
Applicant: REGINALD PUTNAM
Inventor： REGINALD PUTNAM
IPC: B60P3/22
CPC classification number: B60P3/2275 , Y10S152/02
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