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经营范围
发明名称
Loud-speaking and amplified telephone systems
摘要
申请公布号
GB449609(A)
申请公布日期
1936.06.24
申请号
GB19340036952
申请日期
1934.12.24
申请人
LE TELEPHONE PRIVE NATIONAL
发明人
分类号
H04B3/20;H04M9/00
主分类号
H04B3/20
代理机构
代理人
主权项
地址
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