Center joint form,申请号US19460641470-传众专利搜索

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发明名称	Center joint form
摘要
申请公布号	US2458303(A)	申请公布日期	1949.01.04
申请号	US19460641470	申请日期	1946.01.16
申请人	ROBERTSON ROBERT R	发明人	ROBERTSON ROBERT R.
分类号	E01C11/08	主分类号	E01C11/08
代理机构		代理人
主权项
地址

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