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经营范围
发明名称
Acoustical diaphragm
摘要
申请公布号
US1990409(A)
申请公布日期
1935.02.05
申请号
US19330655844
申请日期
1933.02.08
申请人
ERNEST NEVILLE ATHOL
发明人
NEVILLE ATHOL ERNEST
分类号
H04R7/06
主分类号
H04R7/06
代理机构
代理人
主权项
地址
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