-
公开(公告)号：US2484194A
公开(公告)日：1949-10-11
申请号：US58561345
申请日：1945-03-30
Applicant: GREGORY POOLE J
Inventor： STEINHOFF JOHN R
IPC: H01J21/08
CPC classification number: H01J21/08
Search Results
1
records
(took 0.023 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
