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发明名称
Systèmes de transmission à fréquences porteuses et plus particulièrement systèmes de la classe multiplex à division de fréquences
摘要
申请公布号
FR993835(A)
申请公布日期
1951.11.07
申请号
FRD993835
申请日期
1949.08.29
申请人
WESTERN ELECTRIC COMPANY, INC.
发明人
分类号
H03B19/12;H04J1/06
主分类号
H03B19/12
代理机构
代理人
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