-
1.发明授权
公开(公告)号：US2821658A
公开(公告)日：1958-01-28
申请号：US44071754
申请日：1954-07-01
Applicant: BOMAC LAB INC
Inventor： NAUGLER ALBERT W
IPC: H01J17/04
CPC classification number: H01J17/04
Search Results
1
records
(took 0.009 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
