Patent search ap:("BELL TELEPHONE LABOR INC") AND inv:"BARSTOW JOHN M" Page 1

1.

发明授权
Power line carrier frequency telephone system 失效
Title translation: 电力线载波频率电话系统

公开(公告)号：US2510273A

公开(公告)日：1950-06-06

申请号：US70273246

申请日：1946-10-11

Applicant: BELL TELEPHONE LABOR INC

Inventor： BARSTOW JOHN M , LANG ALBERT G

IPC: H04B3/54

CPC classification number: H04B3/54 , H04B2203/5437 , H04B2203/5466

2.

发明授权
Power line carrier frequency telephone system 失效

公开(公告)号：US2511616A

公开(公告)日：1950-06-13

申请号：US70273446

申请日：1946-10-11

Applicant: BELL TELEPHONE LABOR INC

Inventor： BARSTOW JOHN M , LANG ALBERT G

IPC: H04B3/54

CPC classification number: H04B3/54 , H04B2203/5466

3.

发明授权
Power line carrier frequency telephone system 失效

公开(公告)号：US2511615A

公开(公告)日：1950-06-13

申请号：US70273346

申请日：1946-10-11

Applicant: BELL TELEPHONE LABOR INC

Inventor： BARSTOW JOHN M , LANG ALBERT G

IPC: H04B3/54

CPC classification number: H04B3/54 , H04B2203/5437 , H04B2203/5466

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