Improvements in or relating to echo sounding and subaqueous signalling systems,申请号GB19310021301-传众专利搜索

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发明名称	Improvements in or relating to echo sounding and subaqueous signalling systems
摘要
申请公布号	GB382615(A)	申请公布日期	1932.10.25
申请号	GB19310021301	申请日期	1931.07.25
申请人	THE MARCONI SOUNDING DEVICE COMPANY, LIMITED;JOHN AMBROSE SLEE	发明人
分类号	B06B1/02	主分类号	B06B1/02
代理机构		代理人
主权项
地址

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