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发明名称
Acoustic device
摘要
申请公布号
US2532229(A)
申请公布日期
1950.11.28
申请号
US19460649279
申请日期
1946.02.21
申请人
ULTRASONIC CORPORATION
发明人
HORSLEY CAPERTON B.
分类号
G10K5/02
主分类号
G10K5/02
代理机构
代理人
主权项
地址
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