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公开(公告)号：US2181936A
公开(公告)日：1939-12-05
申请号：US18863038
申请日：1938-02-04
Applicant: INT NICKEL CO
Inventor： CLAPPIER ROBERT R , ORIN MCDOWELL JAMES
IPC: B21B3/00
CPC classification number: B21B3/00
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公开(公告)号：US2142869A
公开(公告)日：1939-01-03
申请号：US10352836
申请日：1936-10-01
Applicant: INT NICKEL CO
Inventor： JOHN FRASER HUGH , GEORGE DRUGAN WILLIAM , ORIN MCDOWELL JAMES
IPC: C22F1/10
CPC classification number: C22F1/10
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