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经营范围
发明名称
Right angle drafting triangle
摘要
申请公布号
US3264738(A)
申请公布日期
1966.08.09
申请号
US19640342371
申请日期
1964.02.04
申请人
ACKERMANN JR HERMANN F
发明人
JR. HERMANN F. ACKERMANN,
分类号
B43L7/14
主分类号
B43L7/14
代理机构
代理人
主权项
地址
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