Vacuum control system,申请号US19400333121-传众专利搜索

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发明名称	Vacuum control system
摘要
申请公布号	US2276639(A)	申请公布日期	1942.03.17
申请号	US19400333121	申请日期	1940.05.03
申请人	WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY	发明人	ACKERMANN OTTO
分类号	H01J29/94	主分类号	H01J29/94
代理机构		代理人
主权项
地址

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