-
公开(公告)号:US1823354A
公开(公告)日:1931-09-15
申请号:US38696729
申请日:1929-08-19
Applicant: BELL TELEPHONE LABOR INC
Inventor: DOWD ANDREW D , KERR MARK B , LOCKE GEORGE A
IPC: H04L5/18
CPC classification number: H04L5/18
-
公开(公告)号:US1979026A
公开(公告)日:1934-10-30
申请号:US59820932
申请日:1932-03-11
Applicant: BELL TELEPHONE LABOR INC
Inventor: DOWD ANDREW D
CPC classification number: H04L25/207
-
公开(公告)号:US1941253A
公开(公告)日:1933-12-26
申请号:US60836432
申请日:1932-04-30
Applicant: BELL TELEPHONE LABOR INC
Inventor: DOWD ANDREW D
-
公开(公告)号:US2059564A
公开(公告)日:1936-11-03
申请号:US71382634
申请日:1934-03-03
Applicant: BELL TELEPHONE LABOR INC
Inventor: DOWD ANDREW D
IPC: H04N1/36
CPC classification number: H04N1/36
-
公开(公告)号:US2019597A
公开(公告)日:1935-11-05
申请号:US62948432
申请日:1932-08-19
Applicant: BELL TELEPHONE LABOR INC
Inventor: DOWD ANDREW D
IPC: H04L25/20
CPC classification number: H04L25/207
-
公开(公告)号:US2154608A
公开(公告)日:1939-04-18
申请号:US15390837
申请日:1937-07-16
Applicant: BELL TELEPHONE LABOR INC
Inventor: DOWD ANDREW D
CPC classification number: H04L25/205
-
公开(公告)号:US2041822A
公开(公告)日:1936-05-26
申请号:US71432134
申请日:1934-03-06
Applicant: BELL TELEPHONE LABOR INC
Inventor: DOWD ANDREW D
IPC: H04N1/00
CPC classification number: H04N1/00095
-
-
-
-
-
-