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公开(公告)号：US1540034A
公开(公告)日：1925-06-02
申请号：US40795920
申请日：1920-09-03
Applicant: WESTERN ELECTRIC CO
Inventor： DONAT RICHARD CHARLES
IPC: H01H67/12
CPC classification number: H01H67/12
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公开(公告)号：US1412574A
公开(公告)日：1922-04-11
申请号：US40795820
申请日：1920-09-03
Applicant: WESTERN ELECTRIC CO
Inventor： DONAT RICHARD CHARLES
IPC: H04M3/12
CPC classification number: H04M3/12
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