公开(公告)号：US3154699A

公开(公告)日：1964-10-27

申请号：US8408461

申请日：1961-01-23

Applicant: BELL TELEPHONE LABOR INC

Inventor： COURTNEY-PRATT JEOFRY S

IPC: H02M3/18

CPC classification number: H02M3/18

公开(公告)号：US3622714A

公开(公告)日：1971-11-23

申请号：US3622714D

申请日：1969-09-02

Applicant: BELL TELEPHONE LABOR INC

Inventor： BERKLEY DAVID A ,  COURTNEY-PRATT JEOFRY S

IPC: H04B3/21 ,  H04M9/08 ,  H04Q1/453

CPC classification number: H04Q1/453 ,  H04B3/21 ,  H04M9/087

Abstract: This disclosure describes a system for assuring circuit stability in a telephonic link having substantial acoustic coupling at stations therein, as well as eliminating remote end echo in such circuits. The system uses complementary comb filter banks in which the passband center frequencies are selected to reduce the incidences of harmonic relations among the passband at any one of the filter banks. The system is adapted also to the reduction of electrical circuit echo.

公开(公告)号：US3043960A

公开(公告)日：1962-07-10

申请号：US6258360

申请日：1960-10-14

Applicant: BELL TELEPHONE LABOR INC

Inventor： COURTNEY-PRATT JEOFRY S

IPC: G03B9/08

CPC classification number: G03B9/08

公开(公告)号：US2990529A

公开(公告)日：1961-06-27

申请号：US82656459

申请日：1959-07-13

Applicant: BELL TELEPHONE LABOR INC

Inventor： COURTNEY-PRATT JEOFRY S

IPC: H01B1/00 ,  H01C10/10 ,  H01L23/34

CPC classification number: H01L23/34 ,  H01B1/00 ,  H01C10/10 ,  H01L2924/0002 ,  H01L2924/00

公开(公告)号：US3502969A

公开(公告)日：1970-03-24

申请号：US3502969D

申请日：1966-12-30

Applicant: BELL TELEPHONE LABOR INC

Inventor： COURTNEY-PRATT JEOFRY S ,  EISNER EDWARD

IPC: G01B7/14 ,  G01R27/26

CPC classification number: G01B7/14

公开(公告)号：US3008773A

公开(公告)日：1961-11-14

申请号：US86100559

申请日：1959-12-21

Applicant: BELL TELEPHONE LABOR INC

Inventor： COURTNEY-PRATT JEOFRY S ,  MASON WARREN P

IPC: F16C33/62

CPC classification number: F16C33/62 ,  Y10S384/907

公开(公告)号：US2973441A

公开(公告)日：1961-02-28

申请号：US84092759

申请日：1959-09-18

Applicant: BELL TELEPHONE LABOR INC

Inventor： COURTNEY-PRATT JEOFRY S

IPC: G11C11/44

CPC classification number: G11C11/44 ,  Y10S505/857

公开(公告)号：US2963911A

公开(公告)日：1960-12-13

申请号：US79417359

申请日：1959-02-18

Applicant: BELL TELEPHONE LABOR INC

Inventor： COURTNEY-PRATT JEOFRY S ,  MASON WARREN P

IPC: G01P15/12

CPC classification number: G01P15/123

公开(公告)号：US3435230A

公开(公告)日：1969-03-25

申请号：US3435230D

申请日：1966-12-08

Applicant: BELL TELEPHONE LABOR INC

Inventor： COURTNEY-PRATT JEOFRY S ,  HARGROVE LOGAN E

IPC: H01S3/106 ,  H04B10/155 ,  H01S3/10 ,  H04B9/00

CPC classification number: H04B10/505 ,  H01S3/1068 ,  H04B10/524 ,  H04B10/5563

公开(公告)号：US3241930A

公开(公告)日：1966-03-22

申请号：US27029663

申请日：1963-04-03

Applicant: BELL TELEPHONE LABOR INC

Inventor： COURTNEY-PRATT JEOFRY S ,  SIKORSKI MATHEW E

IPC: F16C33/12

CPC classification number: F16C33/12 ,  F16C33/121 ,  F16C33/14 ,  F16C2223/30 ,  Y10S428/935 ,  Y10S428/938 ,  Y10T428/12771