Patent search ap:("ERICSSON TELEFON AB L M") AND inv:"OLSSON PER OLOF" Page 1

1.

发明授权
Analyzer for automatic telephone exchanges 失效

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

IPC: H04Q3/62 , H04Q3/47 , H04M3/50

CPC classification number: H04Q3/625

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