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公开(公告)号：US1460962A
公开(公告)日：1923-07-03
申请号：US56075422
申请日：1922-05-13
Applicant: HALL SETH M
Inventor： HALL SETH M
IPC: B60B37/00
CPC classification number: B60B37/00
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公开(公告)号：US820863A
公开(公告)日：1906-05-15
申请号：US1905260829
申请日：1905-05-17
Applicant: HALL SETH M
Inventor： HALL SETH M
CPC classification number: A63H13/00
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