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发明名称
自动衈鸣抑制式电话扩声器
摘要
申请公布号
TW000005
申请公布日期
1950.12.31
申请号
TW000005
申请日期
1950.08.23
申请人
徐高士
发明人
徐高士
分类号
H04M
主分类号
H04M
代理机构
代理人
主权项
地址
台北南昌路1段54巷20号
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