Patent search ap:("CSELT CENTRO STUDI LAB TELECOM") AND inv:"FURANKO PIRA" Page 1

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发明专利
DIGITAL TONE RINGING UNIT 失效

公开(公告)号：JPS56114467A

公开(公告)日：1981-09-09

申请号：JP914081

申请日：1981-01-26

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： FURANKO PIRA , GIOBUANNI PONTE

IPC: H04M1/00 , H04M19/04

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