-
公开(公告)号：US2627481A
公开(公告)日：1953-02-03
申请号：US23442351
申请日：1951-06-29
Applicant: GERHARD LEWIN
Inventor： GERHARD LEWIN
IPC: H01J13/10
CPC classification number: H01J13/10 , H01J2893/0077
Search Results
1
records
(took 0.027 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
