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公开(公告)号：US2992587A
公开(公告)日：1961-07-18
申请号：US72790458
申请日：1958-04-11
Applicant: AMERICAN OPTICAL CORP
Inventor： HICKS JR JOHN W , BAZINET JR WILFRED P
IPC: G02B6/06
CPC classification number: G02B6/06
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