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经营范围
发明名称
Roofing calculator
摘要
申请公布号
US2112114(A)
申请公布日期
1938.03.22
申请号
US19350046191
申请日期
1935.10.22
申请人
RAINBOLT KATHERINE D
发明人
RAINBOLT KATHERINE D.
分类号
G06G1/14
主分类号
G06G1/14
代理机构
代理人
主权项
地址
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