-
公开(公告)号：US2030814A
公开(公告)日：1936-02-11
申请号：US61502032
申请日：1932-06-02
Applicant: WESTERN UNION TELEGRAPH CO
Inventor： ERICKSON GEORGE L , CHRISTOFFEL JOHN J
IPC: H04L12/26
CPC classification number: H04L1/248
Search Results
1
records
(took 0.009 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
