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发明名称
Typewriter check protector
摘要
申请公布号
US2922506(A)
申请公布日期
1960.01.26
申请号
US19550539081
申请日期
1955.10.07
申请人
WELLER ROBERT Y
发明人
WELLER ROBERT Y.
分类号
B41J3/00
主分类号
B41J3/00
代理机构
代理人
主权项
地址
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