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公开(公告)号：US712908A
公开(公告)日：1902-11-04
申请号：US1902111038
申请日：1902-06-10
Applicant: JOHN G RICE , ROBERT CLARK , FREDERIC M THOMPSON , CLARK ROBERT C
Inventor： CLARK ROBERT C
CPC classification number: A41D13/04
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