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公开(公告)号：US3293420A
公开(公告)日：1966-12-20
申请号：US38436264
申请日：1964-07-22
Applicant: IBM
Inventor： PITKOWSKY STANLEY H , SHELLY JAMES H
CPC classification number: G06F7/5338 , A63H33/008 , G06F7/535 , G06F2207/5352
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