Wedge fastener for scraper blades,申请号US19390260425-传众专利搜索

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发明名称	Wedge fastener for scraper blades
摘要
申请公布号	US2189745(A)	申请公布日期	1940.02.06
申请号	US19390260425	申请日期	1939.03.07
申请人	JOHNSON ALBERT K	发明人	JOHNSON ALBERT K.
分类号	E02F3/815	主分类号	E02F3/815
代理机构		代理人
主权项
地址

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