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公开(公告)号:US3173995A
公开(公告)日:1965-03-16
申请号:US13882461
申请日:1961-09-18
Applicant: BELL TELEPHONE LABOR INC
Inventor: ABBOTT HENRY H , GERBORE ALEXANDER E , DER LINDEN ERNST VON
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2.No-test or busy verification in a private branch exchange telephone system 失效
Title translation: 在私人分支机构交换电话系统中进行无测试或繁忙的验证公开(公告)号:US3410960A
公开(公告)日:1968-11-12
申请号:US43818265
申请日:1965-03-09
Applicant: BELL TELEPHONE LABOR INC
Inventor: ERWIN EDSON L , GERBORE ALEXANDER E , HOBBS GERALD C , WALSH HENRY J
IPC: H04Q3/54
CPC classification number: H04Q3/54
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3.Private branch exchange telephone system including conference facilities 失效
Title translation: 专用交换电话系统,包括会议设施公开(公告)号:US3099719A
公开(公告)日:1963-07-30
申请号:US15802761
申请日:1961-12-08
Applicant: BELL TELEPHONE LABOR INC
Inventor: GERBORE ALEXANDER E , PLYER ROGER A , STEGER JR WILLIAM C
IPC: H04Q3/00
CPC classification number: H04Q3/0004
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