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公开(公告)号：US2591918A
公开(公告)日：1952-04-08
申请号：US12151849
申请日：1949-10-15
Applicant: PHILIPS LAB INC
Inventor： COLE BYRON M , FREDERIK KERKHOF
IPC: H04N3/185
CPC classification number: H04N3/185
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