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经营范围
发明名称
ULTRASCHALLGENERATOR
摘要
申请公布号
DE2732855(A1)
申请公布日期
1978.05.24
申请号
DE19772732855
申请日期
1977.07.21
申请人
INTERNATIONAL BUSINESS MACHINES CORP.
发明人
LEE MELCHER,ROBERT;VON GUTFELD,ROBERT JACOB
分类号
H04R17/00;G01N21/00;G01N29/00;G01N29/28;G10K15/04;(IPC1-7):B06X/
主分类号
H04R17/00
代理机构
代理人
主权项
地址
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