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发明名称
Filter device
摘要
申请公布号
US4975664(A)
申请公布日期
1990.12.04
申请号
US19890329312
申请日期
1989.03.27
申请人
NGK SPARK PLUG CO., LTD.
发明人
ITO, KENJI;SHIMIZU, HIROYUKI
分类号
H01P1/203;H01P1/205
主分类号
H01P1/203
代理机构
代理人
主权项
地址
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