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经营范围
发明名称
Perfectionnements aux tubes à décharge électronique et à leur utilisation
摘要
申请公布号
FR801197(A)
申请公布日期
1936.07.29
申请号
FRD801197
申请日期
1935.04.29
申请人
"LE MATERIEL TELEPHONIQUE" SOCIETE ANONYME
发明人
分类号
H01J25/72
主分类号
H01J25/72
代理机构
代理人
主权项
地址
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