Apparatus for measuring dust concentration,申请号US19290390634-传众专利搜索

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发明名称	Apparatus for measuring dust concentration
摘要
申请公布号	US1937721(A)	申请公布日期	1933.12.05
申请号	US19290390634	申请日期	1929.09.05
申请人	WALTER SIMON ALFRED;HOLLOWAY WATSON COLEMAN;HENRY RAYMOND	发明人	SIMON ALFRED WALTER;WATSON COLEMAN HOLLOWAY;RAYMOND HENRY
分类号	G01N21/15;G01N21/53	主分类号	G01N21/15
代理机构		代理人
主权项
地址

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