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公开(公告)号：US772221A
公开(公告)日：1904-10-11
申请号：US1903224681
申请日：1903-07-29
Applicant: THOMAS B JOHNS , CRAMER JOHN
Inventor： CRAMER JOHN
CPC classification number: E05D15/0634 , E05Y2201/64 , Y10T16/3813 , Y10T16/3834
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