Sound silencer for projectors,申请号US19420449712-传众专利搜索

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发明名称	Sound silencer for projectors
摘要
申请公布号	US2369786(A)	申请公布日期	1945.02.20
申请号	US19420449712	申请日期	1942.07.04
申请人	HATTIE B. KUHLIK	发明人	KUHLIK JACOB MILES
分类号	G03B31/00	主分类号	G03B31/00
代理机构		代理人
主权项
地址

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