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公开(公告)号：US642872A
公开(公告)日：1900-02-06
申请号：US1899717940
申请日：1899-05-23
Applicant: CHRISTIAN YEGEN , OWENS WILL E
Inventor： OWENS WILL E
CPC classification number: E05F11/00 , Y10S16/20 , Y10S292/62 , Y10T16/3819
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