-
公开(公告)号：US2939986A
公开(公告)日：1960-06-07
申请号：US69035657
申请日：1957-10-15
Applicant: MACHLETT LAB INC
Inventor： LANGER HELMUT A , TALBACK WALDO S
IPC: H01J19/34
CPC classification number: H01J19/34 , H01J2893/0003
Search Results
1
records
(took 0.009 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
