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经营范围
发明名称
Hollow elastic ball
摘要
申请公布号
US2294424(A)
申请公布日期
1942.09.01
申请号
US19380228093
申请日期
1938.09.02
申请人
ALBERT H. BATES
发明人
ROBERTS FRED T.
分类号
B29C63/00;B29D22/04
主分类号
B29C63/00
代理机构
代理人
主权项
地址
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