Means and method for producing a vacuum,申请号US19580736650-传众专利搜索

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发明名称	Means and method for producing a vacuum
摘要
申请公布号	US2947465(A)	申请公布日期	1960.08.02
申请号	US19580736650	申请日期	1958.05.20
申请人	OTAVKA MICHAEL A	发明人	OTAVKA MICHAEL A.
分类号	H01J41/16	主分类号	H01J41/16
代理机构		代理人
主权项
地址

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