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发明名称
GENERATORS OFHOWLERTONE FOR USE IN TELEPHONE EXCHANGES
摘要
申请公布号
GB1488319(A)
申请公布日期
1977.10.12
申请号
GB19750038260
申请日期
1975.09.17
申请人
POST OFFICE
发明人
分类号
H04M19/02;(IPC1-7):H04M3/14
主分类号
H04M19/02
代理机构
代理人
主权项
地址
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