Safety device for pneumatic hammers,申请号US19280303915-传众专利搜索

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发明名称	Safety device for pneumatic hammers
摘要
申请公布号	US1785177(A)	申请公布日期	1930.12.16
申请号	US19280303915	申请日期	1928.09.04
申请人	BOLLOCK JOHN G	发明人	BOLLOCK JOHN G.
分类号	B25D17/08	主分类号	B25D17/08
代理机构		代理人
主权项
地址

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