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经营范围
发明名称
Means for assisting persons in swimming, etc.
摘要
申请公布号
US1788013(A)
申请公布日期
1931.01.06
申请号
US19300438330
申请日期
1930.03.24
申请人
AUGUST CHRISTIANSON
发明人
CHRISTIANSON AUGUST
分类号
A63B31/14
主分类号
A63B31/14
代理机构
代理人
主权项
地址
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