-
公开(公告)号：US2402985A
公开(公告)日：1946-07-02
申请号：US45001842
申请日：1942-07-07
Applicant: BELL TELEPHONE LABOR INC
Inventor： CAUGHEY WILLIAM K , SWARTZEL KARL D
IPC: G11B5/00
CPC classification number: G11B5/00
-
公开(公告)号：US2435195A
公开(公告)日：1948-02-03
申请号：US44785242
申请日：1942-06-20
Applicant: BELL TELEPHONE LABOR INC
Inventor： BOMBERGER DAVID C , LOVELL CLARENCE A , OCH HENRY G , SWARTZEL KARL D , WEBER BRUCE T
IPC: G06G7/188
CPC classification number: G06G7/188
-
Search Results
2
records
(took 0.011 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
