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公开(公告)号：US2349857A
公开(公告)日：1944-05-30
申请号：US50609243
申请日：1943-10-13
Applicant: BELL TELEPHONE LABOR INC
Inventor： FINCH OSCAR J , WHITE JOHN H
IPC: C21D8/12
CPC classification number: C21D8/12
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公开(公告)号：US2347817A
公开(公告)日：1944-05-02
申请号：US41115641
申请日：1941-09-17
Applicant: BELL TELEPHONE LABOR INC
Inventor： FINCH OSCAR J , WHITE JOHN H
CPC classification number: C22C38/08
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