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发明名称
X-Y PLOTTER
摘要
申请公布号
US3613247(A)
申请公布日期
1971.10.19
申请号
USD3613247
申请日期
1969.08.22
申请人
BUTLER NATIONAL CORP.
发明人
EARL STUART PERKINS;DANIEL A. WIERZBOWSKI
分类号
G01C21/22
主分类号
G01C21/22
代理机构
代理人
主权项
地址
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