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发明名称
Whistle
摘要
申请公布号
US2505141(A)
申请公布日期
1950.04.25
申请号
US19440540200
申请日期
1944.06.14
申请人
PITTS NORMAN H
发明人
PITTS NORMAN H.
分类号
G10D7/02;G10K5/00
主分类号
G10D7/02
代理机构
代理人
主权项
地址
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