Automatic ball float tank seal,申请号US19390270036-传众专利搜索

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发明名称	Automatic ball float tank seal
摘要
申请公布号	US2211296(A)	申请公布日期	1940.08.13
申请号	US19390270036	申请日期	1939.04.25
申请人	SHAFT ELIZABETH P	发明人	SHAFT ELIZABETH P.
分类号	E03B11/02	主分类号	E03B11/02
代理机构		代理人
主权项
地址

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