Voice muffler,申请号US19500175102-传众专利搜索

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发明名称	Voice muffler
摘要
申请公布号	US2670054(A)	申请公布日期	1954.02.23
申请号	US19500175102	申请日期	1950.07.21
申请人	TUTTLE HARRY C	发明人	TUTTLE HARRY C.
分类号	H04M1/03;H04M1/19	主分类号	H04M1/03
代理机构		代理人
主权项
地址

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