-
公开(公告)号：US2108635A
公开(公告)日：1938-02-15
申请号：US36294029
申请日：1929-05-14
Applicant: BELL TELEPHONE LABOR INC
Inventor： AIKEN CHARLES B , THOMAS DURFEE
IPC: H01T13/05
CPC classification number: H01T13/05
Search Results
1
records
(took 0.011 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
