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公开(公告)号：US1262475A
公开(公告)日：1918-04-09
申请号：US1914860022
申请日：1914-09-03
Applicant: EDGAR W MARTIN , LAURENCE C MARTIN , GEORGE C BLEECKER , WESLEY C MARTIN
Inventor： FERRIS WILLIAM W
CPC classification number: G02C1/02
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