-
公开(公告)号：US1981058A
公开(公告)日：1934-11-20
申请号：US14159926
申请日：1926-10-14
Applicant: RCA CORP
Inventor： GUGLIELMO MARCONI , SAMUEL FRANKLIN CHARLES
IPC: H01J19/78
CPC classification number: H01J19/78
Search Results
1
records
(took 0.009 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
