Sound pickup device,申请号US19430473415-传众专利搜索

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发明名称	Sound pickup device
摘要
申请公布号	US2452068(A)	申请公布日期	1948.10.26
申请号	US19430473415	申请日期	1943.01.23
申请人	SUBMARINE SIGNAL COMPANY	发明人	PETERSON ROBERT E.
分类号	F41G7/00;F41G7/22;G10K11/30	主分类号	F41G7/00
代理机构		代理人
主权项
地址

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