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经营范围
发明名称
Perfectionnements aux récepteurs de t. s. f. et analogues
摘要
申请公布号
FR831418(A)
申请公布日期
1938.09.02
申请号
FRD831418
申请日期
1937.12.29
申请人
MARCONI'S WIRELESS TELEGRAPH COMPANY LTD.
发明人
分类号
H03J7/04
主分类号
H03J7/04
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