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公开(公告)号：US2158492A
公开(公告)日：1939-05-16
申请号：US7141136
申请日：1936-03-28
Applicant: BELL TELEPHONE LABOR INC
Inventor： BISHOP WALTER M
IPC: H02G15/14
CPC classification number: H02G15/14
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公开(公告)号：US1773938A
公开(公告)日：1930-08-26
申请号：US36884329
申请日：1929-06-06
Applicant: BELL TELEPHONE LABOR INC
Inventor： BISHOP WALTER M
IPC: H01B11/14
CPC classification number: H01B11/14
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