Process of cleaning drain pipes with caustic alkali pellets,申请号US19280321442-传众专利搜索

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发明名称	Process of cleaning drain pipes with caustic alkali pellets
摘要
申请公布号	US1928226(A)	申请公布日期	1933.09.26
申请号	US19280321442	申请日期	1928.11.23
申请人	LADD EDWARD T	发明人	LADD EDWARD T.
分类号	E03C1/30	主分类号	E03C1/30
代理机构		代理人
主权项
地址

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