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公开(公告)号：US3521269A
公开(公告)日：1970-07-21
申请号：US3521269D
申请日：1965-12-20
Applicant: IBM
Inventor： BROOKS EVERETT G , GENTELIA JOHN S
CPC classification number: H03M1/48
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公开(公告)号：CA783780A
公开(公告)日：1968-04-23
申请号：CA783780D
Applicant: IBM
Inventor： BROOKS EVERETT G , GENTELIA JOHN S
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