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经营范围
发明名称
Piezo-electric device
摘要
申请公布号
GB569285(A)
申请公布日期
1945.05.16
申请号
GB19430019017
申请日期
1943.11.15
申请人
"PATELHOLD" PATENTVERWERTUNGS- & ELEKTRO-HOLDING A.G.
发明人
分类号
H01L41/18
主分类号
H01L41/18
代理机构
代理人
主权项
地址
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