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公开(公告)号:US3404344A
公开(公告)日:1968-10-01
申请号:US45430865
申请日:1965-05-10
Applicant: NAT RES DEV
Inventor: CECIL RIDDLE
IPC: G04F10/00 , G04F10/10 , H03K5/26
CPC classification number: G04F10/00 , G04F10/10 , H03K5/26