-
21.发明授权
公开(公告)号：US1916231A
公开(公告)日：1933-07-04
申请号：US63051832
申请日：1932-08-26
Applicant: BELL TELEPHONE LABOR INC
Inventor： OCH HENRY G , HINSHAW FOSTER A
IPC: G01R27/02
CPC classification number: G01R27/02
Search Results
21
records
(took 0.011 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
