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1.发明授权Apparatus for attenuation correction of a coaxial cable used for carrier frequency telephony 失效用于载波频率电话的同轴电缆的衰减校正装置
公开(公告)号：US3022952A
公开(公告)日：1962-02-27
申请号：US77439358
申请日：1958-11-17
Applicant: ERICSSON TELEFON AB L M
Inventor： OLOF JOHANNESSON NILS
IPC: H04B3/10
CPC classification number: H04B3/10
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公开(公告)号：US3370134A
公开(公告)日：1968-02-20
申请号：US36386564
申请日：1964-04-30
Applicant: ERICSSON TELEFON AB L M
Inventor： OLOF JOHANNESSON NILS , NORMANN TRONSLI SVERRE
IPC: H04B17/40
CPC classification number: H04B17/409
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