Diffraction type sound absorber with complementary fitting portions,申请号US19450574771-传众专利搜索

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发明名称	Diffraction type sound absorber with complementary fitting portions
摘要
申请公布号	US2502019(A)	申请公布日期	1950.03.28
申请号	US19450574771	申请日期	1945.01.26
申请人	RADIO CORPORATION	发明人	OLSON HARRY F.
分类号	G10K11/16	主分类号	G10K11/16
代理机构		代理人
主权项
地址

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