Boom actuating motor and locking means,申请号US19530395345-传众专利搜索

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发明名称	Boom actuating motor and locking means
摘要
申请公布号	US2799249(A)	申请公布日期	1957.07.16
申请号	US19530395345	申请日期	1953.12.01
申请人	CHICAGO PNEUMATIC TOOL COMPANY	发明人	LEAR EARL B.
分类号	E21B15/04	主分类号	E21B15/04
代理机构		代理人
主权项
地址

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