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发明名称
Micrometric drawing instrument
摘要
申请公布号
US1785500(A)
申请公布日期
1930.12.16
申请号
US19270167383
申请日期
1927.02.11
申请人
FRANK SCHWARTZ
发明人
SCHWARTZ FRANK
分类号
B43L9/22
主分类号
B43L9/22
代理机构
代理人
主权项
地址
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