-
公开(公告)号：US2269943A
公开(公告)日：1942-01-13
申请号：US30818039
申请日：1939-12-08
Applicant: KISER DARWIN R
Inventor： KISER DARWIN R
IPC: H01J19/00
CPC classification number: H01J19/00 , H01J2893/0023
Search Results
1
records
(took 0.009 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
