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公开(公告)号:CA433155A
公开(公告)日:1946-02-19
申请号:CA433155D
Applicant: RCA CORP
Inventor: WILLIAMS FERD ELTON , NICOLL FREDERICK HERMES
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公开(公告)号:CA472170A
公开(公告)日:1951-03-13
申请号:CA472170D
Applicant: RCA CORP
Inventor: WILLIAMS FERD ELTON , NICOLL FREDERICK HERMES
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