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公开(公告)号：US3325651A
公开(公告)日：1967-06-13
申请号：US81814659
申请日：1959-06-04
Applicant: BELL TELEPHONE LABOR INC
Inventor： ARMSTRONG DOUGLAS B , GIANOLA UMBERTO F
IPC: H03K17/82
CPC classification number: H03K17/82
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公开(公告)号：US3484700A
公开(公告)日：1969-12-16
申请号：US3484700D
申请日：1967-03-31
Applicant: BELL TELEPHONE LABOR INC
Inventor： ARMSTRONG DOUGLAS B
CPC classification number: H03K3/027
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公开(公告)号：US3128449A
公开(公告)日：1964-04-07
申请号：US3592060
申请日：1960-06-14
Applicant: BELL TELEPHONE LABOR INC
Inventor： ARMSTRONG DOUGLAS B
CPC classification number: H03M13/19
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