-
公开(公告)号：US1568694A
公开(公告)日：1926-01-05
申请号：US46205221
申请日：1921-04-16
Applicant: GEN ELECTRIC
Inventor： RUGGLES WILLIAM A
IPC: H01J40/06
CPC classification number: H01J40/06
Search Results
11
records
(took 0.008 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
