公开(公告)号：US2476844A

公开(公告)日：1949-07-19

申请号：US65920246

申请日：1946-04-03

Applicant: BELL TELEPHONE LABOR INC

Inventor： DAVIS RICHARD C ,  GUMLEY ROBERT H

IPC: G09B9/20

CPC classification number: G09B9/20

公开(公告)号：US3617645A

公开(公告)日：1971-11-02

申请号：US3617645D

申请日：1969-07-17

Applicant: BELL TELEPHONE LABOR INC

Inventor： GUMLEY ROBERT H

IPC: H04Q3/00 ,  H04M5/16

CPC classification number: H04Q3/0016

Abstract: A signaling circuit connected between a signal source and a transmission path includes a pair of mutually coupled inductors connected in series with the conductors leading to the transmission path. The mutual coupling between the inductors operates to produce equal signals in the same direction on both conductors connected to the path.

公开(公告)号：US3156898A

公开(公告)日：1964-11-10

申请号：US16216261

申请日：1961-12-26

Applicant: BELL TELEPHONE LABOR INC

Inventor： AVERY ROBERT C ,  GUMLEY ROBERT H ,  ANTHONY MAJLINGER

IPC: H04Q3/42

CPC classification number: H04Q3/42

公开(公告)号：US2428767A

公开(公告)日：1947-10-14

申请号：US50248443

申请日：1943-09-15

Applicant: BELL TELEPHONE LABOR INC

Inventor： ALBERT WALTER P ,  DAVIS RICHARD C ,  GUMLEY ROBERT H ,  HOLDEN WILLIAM H T

IPC: G09B9/16

CPC classification number: G09B9/16

公开(公告)号：US2395477A

公开(公告)日：1946-02-26

申请号：US54297244

申请日：1944-06-30

Applicant: BELL TELEPHONE LABOR INC

Inventor： GUMLEY ROBERT H

IPC: G09B9/16

CPC classification number: G09B9/16

公开(公告)号：US2361542A

公开(公告)日：1944-10-31

申请号：US39228141

申请日：1941-05-07

Applicant: BELL TELEPHONE LABOR INC

Inventor： GUMLEY ROBERT H

IPC: H01H50/46

CPC classification number: H01H50/46