Pump attachment for pneumatic swabs,申请号US19300497985-传众专利搜索

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发明名称	Pump attachment for pneumatic swabs
摘要
申请公布号	US1970917(A)	申请公布日期	1934.08.21
申请号	US19300497985	申请日期	1930.11.25
申请人	HUGHES TOOL COMPANY	发明人	RICKER NORMAN H.
分类号	F04B47/12	主分类号	F04B47/12
代理机构		代理人
主权项
地址

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