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公开(公告)号：US2964361A
公开(公告)日：1960-12-13
申请号：US78627459
申请日：1959-01-12
Applicant: HANSEN BOBBY J
Inventor： HANSEN BOBBY J
IPC: B62D55/28
CPC classification number: B62D55/28
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公开(公告)号：US3065529A
公开(公告)日：1962-11-27
申请号：US68282457
申请日：1957-09-09
Applicant: HANSEN BOBBY J
Inventor： HANSEN BOBBY J
IPC: B21K1/70
CPC classification number: B21K1/707 , Y10T29/49748 , Y10T29/49918
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