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公开(公告)号：US3191015A
公开(公告)日：1965-06-22
申请号：US4499260
申请日：1960-07-25
Applicant: LAB FOR ELECTRONICS INC
Inventor： HANSEN CARL W , ANTHONY CEDRONE
IPC: G06G7/186
CPC classification number: G06G7/1865
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