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经营范围
发明名称
Buoyancy ring
摘要
申请公布号
US3296636(A)
申请公布日期
1967.01.10
申请号
US19640412172
申请日期
1964.11.18
申请人
BERNHARD MARKWITZ
发明人
MARKWITZ BERNHARD
分类号
B63C9/15
主分类号
B63C9/15
代理机构
代理人
主权项
地址
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