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Code converter
摘要
申请公布号
US2603705(A)
申请公布日期
1952.07.15
申请号
US19460676841
申请日期
1946.06.14
申请人
STAATSBEDRIJF DER POSTERIJEN
发明人
DUUREN HENDRIK C. A. VAN
分类号
H03M13/51
主分类号
H03M13/51
代理机构
代理人
主权项
地址
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