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公开(公告)号：US2115791A
公开(公告)日：1938-05-03
申请号：US2196035
申请日：1935-05-17
Applicant: RCA CORP
Inventor： BERTRAM SMITH SIDNEY , MORRIS WRIGHT FRANK
IPC: H03H7/24
CPC classification number: H03H7/24
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