Patent search ap:("WESTERN UNION TELEGRAPH CO") AND inv:"CHRISTIE JR THOMAS A" Page 1

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发明授权
Transmission test apparatus 失效
Title translation: 传动试验装置

公开(公告)号：US2929875A

公开(公告)日：1960-03-22

申请号：US70392157

申请日：1957-12-19

Applicant: WESTERN UNION TELEGRAPH CO

Inventor： BOUGHTWOOD JOHN E , ALBERT BOGGS , CHRISTIE JR THOMAS A

IPC: H04L12/26 , H04L25/04

CPC classification number: H04L1/248

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