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发明名称
Crayon pointer
摘要
申请公布号
US2664072(A)
申请公布日期
1953.12.29
申请号
US19520307875
申请日期
1952.09.04
申请人
KNAPP MARY C
发明人
KNAPP MARY C.
分类号
B43L23/00
主分类号
B43L23/00
代理机构
代理人
主权项
地址
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