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经营范围
发明名称
Electroacoustic converter
摘要
申请公布号
US2621261(A)
申请公布日期
1952.12.09
申请号
US19500153888
申请日期
1950.04.04
申请人
TELEFONAKTIEBOLAGET L M ERICSSON
发明人
KARLSSON STURE ELIS;SKOG STIG RUNE LENNART
分类号
H04R9/10
主分类号
H04R9/10
代理机构
代理人
主权项
地址
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