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公开(公告)号：US3382322A
公开(公告)日：1968-05-07
申请号：US41619964
申请日：1964-12-07
Applicant: COSSOR LTD A C
Inventor： FRANCIS DUERDEN , DONALD ALLEN PATRICK
CPC classification number: H04M15/36 , B61L23/005 , G08C19/025 , H04Q5/02 , H04Q5/06
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