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发明名称
IMPROVEMENTS IN OR RELATING TO SUPPLYING A CHARGING CURRENT BY WAY OF TELEPHONE LINES
摘要
申请公布号
HK24277(A)
申请公布日期
1977.05.27
申请号
HK19770000242
申请日期
1977.05.19
申请人
POST OFFICE
发明人
MATTHEWS O CH
分类号
H04M19/08;(IPC1-7):H04M19/08
主分类号
H04M19/08
代理机构
代理人
主权项
地址
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