Method and apparatus for recording and reproducing,申请号US19390283220-传众专利搜索

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发明名称	Method and apparatus for recording and reproducing
摘要
申请公布号	US2292014(A)	申请公布日期	1942.08.04
申请号	US19390283220	申请日期	1939.07.07
申请人	WIRELESS RESEARCH CORPORATION	发明人	ROBERTS WILLIAM W.
分类号	G11B7/00	主分类号	G11B7/00
代理机构		代理人
主权项
地址

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