公开(公告)号：US1882849A

公开(公告)日：1932-10-18

申请号：US38253529

申请日：1929-07-31

Applicant: BELL TELEPHONE LABOR INC

Inventor： MARRISON WARREN A

IPC: H03B13/00

CPC classification number: H03B13/00

公开(公告)号：US1869160A

公开(公告)日：1932-07-26

申请号：US27701728

申请日：1928-05-11

Applicant: BELL TELEPHONE LABOR INC

Inventor： MARRISON WARREN A

IPC: H03H3/02 ,  H03H3/04

CPC classification number: H03H3/02 ,  H03H3/04 ,  Y10S125/901 ,  Y10T29/42

公开(公告)号：US1785036A

公开(公告)日：1930-12-16

申请号：US24360427

申请日：1927-12-30

Applicant: BELL TELEPHONE LABOR INC

Inventor： MARRISON WARREN A

IPC: H03H3/04

CPC classification number: H03H3/04

公开(公告)号：US1784844A

公开(公告)日：1930-12-16

申请号：US22683127

申请日：1927-10-18

Applicant: BELL TELEPHONE LABOR INC

Inventor： MARRISON WARREN A

IPC: H03B5/30

CPC classification number: H03B5/30

公开(公告)号：US1768262A

公开(公告)日：1930-06-24

申请号：US25262828

申请日：1928-02-07

Applicant: BELL TELEPHONE LABOR INC

Inventor： MARRISON WARREN A

IPC: G01R27/32

CPC classification number: G01R27/32

公开(公告)号：US1757727A

公开(公告)日：1930-05-06

申请号：US14257326

申请日：1926-10-19

Applicant: BELL TELEPHONE LABOR INC

Inventor： MARRISON WARREN A

IPC: G05D23/275

CPC classification number: G05D23/27539