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1.Automatic telephone exchange for subscriber's instruments with push button keysending 失效
Title translation: 自动电话交换机用于用户按键的用户手册公开(公告)号:US3478172A
公开(公告)日:1969-11-11
申请号:US3478172D
申请日:1965-06-03
Applicant: ERICSSON TELEFON AB L M
Inventor: BJORK HAROLD JOHN CARL , KILANDER SVEN GUSTAV INGEMAR
CPC classification number: H04Q3/42
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公开(公告)号:US3534174A
公开(公告)日:1970-10-13
申请号:US3534174D
申请日:1966-10-26
Applicant: ERICSSON TELEFON AB L M
Inventor: JOHANSEN KNUT , KILANDER SVEN GUSTAV INGEMAR , OLSSON PER OLOF
CPC classification number: H04Q3/625
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公开(公告)号:US3521003A
公开(公告)日:1970-07-21
申请号:US3521003D
申请日:1966-11-23
Applicant: ERICSSON TELEFON AB L M
CPC classification number: H04Q3/625
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