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公开(公告)号：US2558018A
公开(公告)日：1951-06-26
申请号：US77253247
申请日：1947-09-06
Applicant: INT STANDARD ELECTRIC CORP
Inventor： MARCUS THORNTON ALFRED , THOMAS PRIOR HECTOR , JAMES GOULLEE STANLEY
IPC: H04J1/18
CPC classification number: H04J1/18
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