-
公开(公告)号：US2225032A
公开(公告)日：1940-12-17
申请号：US23480138
申请日：1938-10-13
Applicant: KOLLSMAN PAUL
Inventor： CARBONARA VICTOR E
CPC classification number: H01J21/18 , H01J19/02 , H01J21/08 , H01J2893/0001 , Y10T74/125
Search Results
1
records
(took 0.009 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
