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经营范围
发明名称
Piezoelectric transducer
摘要
申请公布号
US2405187(A)
申请公布日期
1946.08.06
申请号
US19410418229
申请日期
1941.11.07
申请人
SUBMARINE SIGNAL COMPANY
发明人
BENIOFF HUGO
分类号
B06B1/06
主分类号
B06B1/06
代理机构
代理人
主权项
地址
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