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经营范围
发明名称
Piezoelektrisches Element
摘要
申请公布号
DE938255(C)
申请公布日期
1956.01.26
申请号
DE1954N008442
申请日期
1954.02.11
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
HEKKERT JAN WILLEM;SCHEPMAN FELIX ROBERT
分类号
H01L41/04;H01L41/39;H04R17/00
主分类号
H01L41/04
代理机构
代理人
主权项
地址
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