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发明名称
Device for reproducing sound
摘要
申请公布号
US2160112(A)
申请公布日期
1939.05.30
申请号
US19360058430
申请日期
1936.01.09
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
URK AREND THOMAS VAN;VERMEULEN ROELOF
分类号
D03D37/00;D03D51/28;H04R1/26
主分类号
D03D37/00
代理机构
代理人
主权项
地址
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