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

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发明专利
METHOD OF AND DEVICE FOR RECOGNIZING MULTIIFREQUENCY CODED TELEPHONE SIGNAL CONVERTED TO DIGITAL FORMAT 失效

公开(公告)号：JPS53121408A

公开(公告)日：1978-10-23

申请号：JP14409877

申请日：1977-12-02

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： FURABUIO MERINDO , RENATO ROTSUSHI

IPC: H04L27/26 , H04M3/00 , H04Q1/457 , H04Q1/50 , H04Q11/04

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