Patent search ap:("BELL TELEPHONE LABOR INC") AND inv:"FITZPATRICK JAMES J" Page 1

1.

发明授权
Telephone answering and recording system 失效
Title translation: 电话录音系统

公开(公告)号：US3190961A

公开(公告)日：1965-06-22

申请号：US16101661

申请日：1961-12-21

Applicant: BELL TELEPHONE LABOR INC

Inventor： FITZPATRICK JAMES J , ALFRED ZAROUNI

IPC: H04M3/533

CPC classification number: H04M3/533

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