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公开(公告)号：US3188477A
公开(公告)日：1965-06-08
申请号：US13223261
申请日：1961-08-17
Applicant: BELL TELEPHONE LABOR INC
Inventor： AULT CYRUS F
IPC: G11C13/04
CPC classification number: G11C13/048
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公开(公告)号：US3135923A
公开(公告)日：1964-06-02
申请号：US6196960
申请日：1960-10-11
Applicant: BELL TELEPHONE LABOR INC
Inventor： AULT CYRUS F , GENKE RICHARD M
IPC: H01J31/60
CPC classification number: H01J31/60
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