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发明名称
Free-play device
摘要
申请公布号
US2207617(A)
申请公布日期
1940.07.09
申请号
US19380240321
申请日期
1938.11.14
申请人
GENCO, INC.
发明人
GENSBURG MYER
分类号
A63F7/02
主分类号
A63F7/02
代理机构
代理人
主权项
地址
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