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公开(公告)号：US2866176A
公开(公告)日：1958-12-23
申请号：US55758356
申请日：1956-01-05
Applicant: IBM
Inventor： DURFEE BENJAMIN M , MILLER ALBERT D , UNDERWOOD FRANCIS O
CPC classification number: H03M1/00
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公开(公告)号：US2867790A
公开(公告)日：1959-01-06
申请号：US55364055
申请日：1955-12-16
Applicant: IBM
Inventor： DURFEE BENJAMIN M , MILLER ALBERT D
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