-
公开(公告)号：US2508529A
公开(公告)日：1950-05-23
申请号：US1347648
申请日：1948-03-06
Applicant: BELL TELEPHONE LABOR INC
Inventor： MENZEL PAUL R , RONCI VICTOR L , YANCE ROBERT L
IPC: H01J17/54
CPC classification number: H01J17/54
Search Results
1
records
(took 0.018 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
