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公开(公告)号：US2105289A
公开(公告)日：1938-01-11
申请号：US75371034
申请日：1934-11-19
Applicant: LOBDELL EMERY MFG COMPANY
Inventor： LOBDELL JR EDWARD J
IPC: B21D53/30
CPC classification number: B21D53/30 , Y10T29/49529
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公开(公告)号：US2080866A
公开(公告)日：1937-05-18
申请号：US73484634
申请日：1934-07-12
Applicant: LOBDELL EMERY MFG COMPANY
Inventor： LOBDELL JR EDWARD J
IPC: B21D53/30
CPC classification number: B21D53/30 , Y10T29/49529
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