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公开(公告)号：US986181A
公开(公告)日：1911-03-07
申请号：US1909474902
申请日：1909-01-29
Applicant: MARY A CORTHILL , KRAFT OLIVER D , FETZER LOUIS W
Inventor： KRAFT OLIVER D , FETZER LOUIS W
CPC classification number: D05B69/16 , E05Y2201/214
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