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发明名称
Improvements in and relating to piezo-electric transducers
摘要
申请公布号
GB835691(A)
申请公布日期
1960.05.25
申请号
GB19550003599
申请日期
1955.02.07
申请人
NATIONAL RESEARCH DEVELOPMENT CORPORATION
发明人
BRADFIELD GEOFFREY
分类号
G01H1/10;H04R17/00
主分类号
G01H1/10
代理机构
代理人
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地址
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