Improvements in or relating to optical systems for photographic recording of the waveform of electric currents such as those influenced by sound waves,申请号GB19310001307-传众专利搜索

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发明名称	Improvements in or relating to optical systems for photographic recording of the waveform of electric currents such as those influenced by sound waves
摘要
申请公布号	GB366254(A)	申请公布日期	1932.02.04
申请号	GB19310001307	申请日期	1931.01.14
申请人	ALFRED POURTALES CASTELLAIN	发明人
分类号	G01R13/04	主分类号	G01R13/04
代理机构		代理人
主权项
地址

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