-
公开(公告)号：US2493897A
公开(公告)日：1950-01-10
申请号：US75319247
申请日：1947-06-07
Applicant: IBM
Inventor： PETZ JOHN L , BALLIETT CHARLES G
IPC: H01H35/10
CPC classification number: H01H35/10
Search Results
1
records
(took 0.013 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
