Mason's line block,申请号US19490124597-传众专利搜索

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发明名称	Mason's line block
摘要
申请公布号	US2592717(A)	申请公布日期	1952.04.15
申请号	US19490124597	申请日期	1949.10.31
申请人	MANN CECIL E	发明人	MANN CECIL E.
分类号	E04G21/18	主分类号	E04G21/18
代理机构		代理人
主权项
地址

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