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公开(公告)号：US2854349A
公开(公告)日：1958-09-30
申请号：US45724654
申请日：1954-09-20
Applicant: AMERICAN OPTICAL CORP
Inventor： DREYFUS MARC G , UPTON LEE O , HELEN JUPNIK
IPC: G02B5/20
CPC classification number: G02B5/208 , Y10S501/904 , Y10S501/905 , Y10T428/261
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