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发明名称
Key identification device
摘要
申请公布号
US2507794(A)
申请公布日期
1950.05.16
申请号
US19490083142
申请日期
1949.03.24
申请人
FRANK H. HARMON
发明人
LONGNECKER HARRY F.
分类号
A44C15/00;G09F3/00;G09F11/23
主分类号
A44C15/00
代理机构
代理人
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地址
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