VARIABLE FOCUS ELECTROACOUSTIC TRANSDUCER,申请号USD3474402-传众专利搜索

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发明名称	VARIABLE FOCUS ELECTROACOUSTIC TRANSDUCER
摘要
申请公布号	US3474402(A)	申请公布日期	1969.10.21
申请号	USD3474402	申请日期	1968.05.06
申请人	NAVY USA	发明人	RUFUS L. COOK;JESSE L. BEALOR JR.
分类号	G10K11/32;(IPC1-7):H04B13/00	主分类号	G10K11/32
代理机构		代理人
主权项
地址

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