-
公开(公告)号：US2865568A
公开(公告)日：1958-12-23
申请号：US55148955
申请日：1955-12-07
Applicant: BELL TELEPHONE LABOR INC
Inventor： ABBRECHT RICHARD L , EDWARD VROOM
IPC: G06F7/42
CPC classification number: G06F7/42
Search Results
1
records
(took 0.011 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
