发明名称 |
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摘要 |
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申请公布号 |
FR985193(A) |
申请公布日期 |
1951.07.16 |
申请号 |
FRD985193 |
申请日期 |
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申请人 |
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发明人 |
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分类号 |
H04Q1/18;H04Q3/42 |
主分类号 |
H04Q1/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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