-
公开(公告)号：US2000845A
公开(公告)日：1935-05-07
申请号：US51511831
申请日：1931-02-11
Applicant: PHILIPS NV
Inventor： BRUNO JONAS GOTTFRIED , THERMAN ESSELING AUGUST
IPC: H01J5/18
CPC classification number: H01J5/18
Search Results
1
records
(took 0.01 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
