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公开(公告)号：US3060271A
公开(公告)日：1962-10-23
申请号：US8778961
申请日：1961-02-08
Applicant: ITT
Inventor： LEONARD LAMIN , OAK PARK , MORRIS RIBNER
IPC: H04Q3/00
CPC classification number: H04Q3/0004
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