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发明名称
PIEZOELECTRIC DEVICE HAVING A RESISTOR AND A PLASTIC INSULATING CASING
摘要
申请公布号
US3585417(A)
申请公布日期
1971.06.15
申请号
USD3585417
申请日期
1969.03.06
申请人
P.R. MALLORY & CO. INC.
发明人
RALPH K. HELFEN
分类号
F23Q3/00;H01L41/113;(IPC1-7):H01V7/00
主分类号
F23Q3/00
代理机构
代理人
主权项
地址
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