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公开(公告)号：US2563824A
公开(公告)日：1951-08-14
申请号：US11684049
申请日：1949-09-20
Applicant: BELL TELEPHONE LABOR INC
Inventor： DUNLAP KERMIT S , SECKLER HOWARD N
IPC: H04L13/12
CPC classification number: H04L13/12
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公开(公告)号：US2992410A
公开(公告)日：1961-07-11
申请号：US56840556
申请日：1956-02-28
Applicant: BELL TELEPHONE LABOR INC
Inventor： GROTH WILLARD B , SECKLER HOWARD N
CPC classification number: H04Q3/521 , H03K17/6221
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公开(公告)号：US2876288A
公开(公告)日：1959-03-03
申请号：US55428055
申请日：1955-12-20
Applicant: BELL TELEPHONE LABOR INC
Inventor： BROOKS CHESTER E , FLECKENSTEIN WILLIAM O , LEE ROBERT C , SECKLER HOWARD N
IPC: H04Q3/00
CPC classification number: H04Q3/0004
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