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

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发明授权
Pulse code modulation communication system 失效
Title translation: 脉码调制通信系统

公开(公告)号：US3020350A

公开(公告)日：1962-02-06

申请号：US59296745

申请日：1945-05-10

Applicant: BELL TELEPHONE LABOR INC

Inventor： BLACK HAROLD S , OLIVER EDSON JAMES

IPC: H03M1/00 , H04B14/04

CPC classification number: H04B14/04 , H03M1/506

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