Patent search ap:("BELL TELEPHONE LABOR INC") AND inv:"CLARK MALCOLM A" Page 1

1.

发明授权
Two-way television over telephone lines 失效
Title translation: 电话线双向电视

公开(公告)号：US2922843A

公开(公告)日：1960-01-26

申请号：US52592755

申请日：1955-08-02

Applicant: BELL TELEPHONE LABOR INC

Inventor： CLARK MALCOLM A , MILLER RALPH L , SEARS RAYMOND W

IPC: H04N7/14

CPC classification number: H04N7/142

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