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公开(公告)号：US1727550A
公开(公告)日：1929-09-10
申请号：US13977726
申请日：1926-10-06
Applicant: BELL TELEPHONE LABOR INC
Inventor： LEGG VICTOR E
IPC: H01B13/28
CPC classification number: H01B13/282 , Y10S428/928 , Y10S428/937 , Y10T428/12333 , Y10T428/12986 , Y10T428/2936 , Y10T428/2944
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