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发明名称
Card or sign display mechanism
摘要
申请公布号
US1861235(A)
申请公布日期
1932.05.31
申请号
US19310554129
申请日期
1931.07.30
申请人
ERNEST A. PLEDGER
发明人
MARSH CLAUDE E.
分类号
G09F11/12
主分类号
G09F11/12
代理机构
代理人
主权项
地址
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