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信封(七位点墨编码)
摘要
本编码信封是在大方格的小格内点墨代替数字进行编码,可适用于电脑自动化识别。
申请公布号
CN3072464D
申请公布日期
1998.01.14
申请号
CN97302302.3
申请日期
1997.06.03
申请人
阎道原
发明人
阎道原
分类号
19-01-E0084
主分类号
19-01-E0084
代理机构
代理人
主权项
地址
454650河南省济源市宣化六巷2-2-6
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