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公开(公告)号:US3540033A
公开(公告)日:1970-11-10
申请号:US3540033D
申请日:1967-12-28
Applicant: IBM
Inventor: CRAWFORD JOHN K , CROLL DONALD C , HULSIZER JOHN C , KENDALL FRANK T , SCHAEFFER GEORGE B JR
CPC classification number: G09G3/045
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公开(公告)号:US3464265A
公开(公告)日:1969-09-02
申请号:US3464265D
申请日:1965-06-21
Applicant: IBM
Inventor: HENDRICKSON THOMAS A , CROLL DONALD C
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公开(公告)号:US3080113A
公开(公告)日:1963-03-05
申请号:US77939858
申请日:1958-12-10
Applicant: IBM
Inventor: CROLL DONALD C
IPC: G06K13/077
CPC classification number: G06K13/077
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公开(公告)号:US3012711A
公开(公告)日:1961-12-12
申请号:US70600557
申请日:1957-12-30
Applicant: IBM
Inventor: CROLL DONALD C
CPC classification number: H03M1/00
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