Vacuum producing equipment,申请号US19330663958-传众专利搜索

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发明名称	Vacuum producing equipment
摘要
申请公布号	US1945973(A)	申请公布日期	1934.02.06
申请号	US19330663958	申请日期	1933.04.01
申请人	ROSS HEATER & MFG. CO. INC.	发明人	GRAHAM HAROLD M.
分类号	F01B25/00	主分类号	F01B25/00
代理机构		代理人
主权项
地址

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