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经营范围
发明名称
LADDERRTYPE PIEZOELECTRIC FILTER
摘要
PURPOSE:To obtain a highly assured attenuation quantity filter through which the spurious response is restrained, by combining the piezoelectric resonators of different sound speed.
申请公布号
JPS5390844(A)
申请公布日期
1978.08.10
申请号
JP19770006142
申请日期
1977.01.21
申请人
NIPPON ELECTRIC CO
发明人
TAKAHASHI SADAYUKI
分类号
H03H9/58;H03H9/60
主分类号
H03H9/58
代理机构
代理人
主权项
地址
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