-
公开(公告)号：US1984533A
公开(公告)日：1934-12-18
申请号：US56074031
申请日：1931-09-02
Applicant: BELL TELEPHONE LABOR INC
Inventor： KNOTT WILLIAM M
IPC: H03H9/09
CPC classification number: H03H9/09
-
公开(公告)号：US2101668A
公开(公告)日：1937-12-07
申请号：US4217235
申请日：1935-09-26
Applicant: BELL TELEPHONE LABOR INC
Inventor： BISHOP JOHN B , KNOTT WILLIAM M
IPC: H04B1/46
CPC classification number: H04B1/46
-
公开(公告)号：US2126895A
公开(公告)日：1938-08-16
申请号：US8907036
申请日：1936-07-06
Applicant: BELL TELEPHONE LABOR INC
Inventor： KNOTT WILLIAM M
IPC: H03K17/288
CPC classification number: H03K17/288
-
-
Search Results
3
records
(took 0.011 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
