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公开(公告)号：US2795993A
公开(公告)日：1957-06-18
申请号：US36510353
申请日：1953-06-30
Applicant: AMERICAN OPTICAL CORP
Inventor： LEVERETT HOLLIS M , TRAVIS LAWRENCE R , THORBURN MILTON R
IPC: A61B3/02
CPC classification number: A61B3/02
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