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经营范围
发明名称
Drafting device
摘要
申请公布号
US3330580(A)
申请公布日期
1967.07.11
申请号
US19660564298
申请日期
1966.07.11
申请人
WILLIAM E. BERGEMANN
发明人
VANEK DONALD F.
分类号
B43L13/04
主分类号
B43L13/04
代理机构
代理人
主权项
地址
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