Patent search ap:("BELL TELEPHONE LABOR INC") AND inv:"MEACHAM LARNED A" Page 8

71.

发明授权
Phase shifting apparatus 失效
Title translation: 相移装置

公开(公告)号：US2004613A

公开(公告)日：1935-06-11

申请号：US68635233

申请日：1933-08-23

Applicant: BELL TELEPHONE LABOR INC

Inventor： MEACHAM LARNED A

IPC: H03H7/20 , H03H7/21

CPC classification number: H03H7/20 , H03H7/21

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