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公开(公告)号：CA967420A
公开(公告)日：1975-05-13
申请号：CA137404
申请日：1972-03-17
Applicant: IBM
Inventor： CROOKS WALTER , SHATTUCK MEREDITH D
IPC: G03G5/06
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公开(公告)号：CA841552A
公开(公告)日：1970-05-12
申请号：CA841552D
Applicant: IBM
Inventor： NEPELA DANIEL A , SHATTUCK MEREDITH D , VAHTRA ULO
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