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公开(公告)号：US2836720A
公开(公告)日：1958-05-27
申请号：US53254255
申请日：1955-09-06
Applicant: RCA CORP
Inventor： SIDNEY STERNBERG , VANCE ARTHUR W
IPC: H04Q11/04
CPC classification number: H04Q11/04
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