-
公开(公告)号：US1733608A
公开(公告)日：1929-10-29
申请号：US29825728
申请日：1928-08-08
Applicant: BELL TELEPHONE LABOR INC
Inventor： KNOX WILLIAM G , RUSSELL ALEXANDER G
IPC: G11B3/48
CPC classification number: G11B3/48
Search Results
1
records
(took 0.033 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
