Pivot bearing for rail trucks,申请号US19400321504-传众专利搜索

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发明名称	Pivot bearing for rail trucks
摘要
申请公布号	US2289835(A)	申请公布日期	1942.07.14
申请号	US19400321504	申请日期	1940.02.29
申请人	BLAW-KNOX COMPANY	发明人	GRAVES JOHN R.
分类号	B61F5/16	主分类号	B61F5/16
代理机构		代理人
主权项
地址

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