Mechanical resonance indicators,申请号US19570680750-传众专利搜索

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发明名称	Mechanical resonance indicators
摘要
申请公布号	US3044290(A)	申请公布日期	1962.07.17
申请号	US19570680750	申请日期	1957.08.28
申请人	RAYTHEON COMPANY	发明人	RAWDING BURTON R.
分类号	H04R29/00	主分类号	H04R29/00
代理机构		代理人
主权项
地址

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