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公开(公告)号：CA286561A
公开(公告)日：1929-01-15
申请号：CA286561D
Applicant: BROOKS JOSHUA TWING , SKOWRON EDMUND A
Inventor： SKOWRON EDMUND A , BROOKS JOSHUA TWING
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公开(公告)号：US2382339A
公开(公告)日：1945-08-14
申请号：US56270244
申请日：1944-11-09
Applicant: SKOWRON EDMUND A , WOODINGS WILBERT H
Inventor： SKOWRON EDMUND A , WOODINGS WILBERT H
IPC: B21J13/08
CPC classification number: B21J13/08
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