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公开(公告)号：US2802937A
公开(公告)日：1957-08-13
申请号：US42780754
申请日：1954-05-05
Applicant: BELL TELEPHONE LABOR INC
Inventor： DAVEY JAMES R , ALBERT WILSON
IPC: H04L27/10
CPC classification number: H04L27/10
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公开(公告)号：US2523748A
公开(公告)日：1950-09-26
申请号：US64415046
申请日：1946-01-29
Applicant: BELL TELEPHONE LABOR INC
Inventor： ALBERT WILSON
IPC: H04L27/02
CPC classification number: H04L27/02
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