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公开(公告)号：US2237180A
公开(公告)日：1941-04-01
申请号：US24441438
申请日：1938-12-07
Applicant: GEN ELECTRIC
Inventor： HAHN CLARENCE E , BOYER OSCAR A
IPC: B21H3/00
CPC classification number: B21H3/00
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公开(公告)号：US2646881A
公开(公告)日：1953-07-28
申请号：US8464649
申请日：1949-03-31
Applicant: GEN ELECTRIC
Inventor： BOYER OSCAR A
IPC: B07C5/26
CPC classification number: B07C5/26 , Y10S209/914 , Y10S209/919
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