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发明名称
Tracing protector for drafting tables
摘要
申请公布号
US2699627(A)
申请公布日期
1955.01.18
申请号
US19520320634
申请日期
1952.11.14
申请人
MATTHEWS JR JOHN W
发明人
JR. JOHN W. MATTHEWS,
分类号
B43L5/02
主分类号
B43L5/02
代理机构
代理人
主权项
地址
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