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经营范围
发明名称
Right-angled triangle as an auxiliary calculating device
摘要
申请公布号
US3139234(A)
申请公布日期
1964.06.30
申请号
US19610116740
申请日期
1961.06.13
申请人
REYES DINAMARQUE REMIGIO
发明人
DINAMARQUE REMIGIO REYES
分类号
G06G1/00
主分类号
G06G1/00
代理机构
代理人
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