TRANSDUCER HAVING MECHANICAL IMPEDANCE MATCHING BETWEEN AIR AND THE DRIVER,申请号USD3535471-传众专利搜索

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发明名称	TRANSDUCER HAVING MECHANICAL IMPEDANCE MATCHING BETWEEN AIR AND THE DRIVER
摘要
申请公布号	US3535471(A)	申请公布日期	1970.10.20
申请号	USD3535471	申请日期	1969.09.10
申请人	MOTOROLA INC.	发明人	HUGO W. SCHAFFT
分类号	H04R1/30;(IPC1-7):H04R17/00	主分类号	H04R1/30
代理机构		代理人
主权项
地址

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