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公开(公告)号：US3014982A
公开(公告)日：1961-12-26
申请号：US70649957
申请日：1957-12-31
Applicant: BELL TELEPHONE LABOR INC
Inventor： OSTENDORF JR BERNARD , SELLERS JR GABE A
CPC classification number: H04L12/00
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公开(公告)号：US3005041A
公开(公告)日：1961-10-17
申请号：US70646257
申请日：1957-12-31
Applicant: BELL TELEPHONE LABOR INC
Inventor： SELLERS JR GABE A
CPC classification number: H04L12/00
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