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发明名称
防窥视密码器
摘要
右视图与左视图对称,后视图为一平面,故省略其它视图。
申请公布号
CN3313184D
申请公布日期
2003.08.13
申请号
CN02341134.1
申请日期
2002.11.06
申请人
于继和
发明人
于继和
分类号
08-07
主分类号
08-07
代理机构
代理人
主权项
地址
250002山东省济南市七里山南六区11楼中301室
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