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公开(公告)号:US788245A
公开(公告)日:1905-04-25
申请号:US1904222844
申请日:1904-08-31
Applicant: DRAPER AND MAYNARD COMPANY
Inventor: BURTT ALBERT F
CPC classification number: A63B69/201
公开(公告)号:US788245A
公开(公告)日:1905-04-25
申请号:US1904222844
申请日:1904-08-31
Applicant: DRAPER AND MAYNARD COMPANY
Inventor: BURTT ALBERT F
CPC classification number: A63B69/201