-
公开(公告)号：US2920231A
公开(公告)日：1960-01-05
申请号：US60642056
申请日：1956-08-27
Applicant: BELL TELEPHONE LABOR INC
Inventor： BEURRIER HENRY R
IPC: H04N3/12
CPC classification number: H04N3/12
Search Results
11
records
(took 0.01 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
