Extensible and retractable device having manually releasable positive locking means,申请号US19610110673-传众专利搜索

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发明名称	Extensible and retractable device having manually releasable positive locking means
摘要
申请公布号	US3107933(A)	申请公布日期	1963.10.22
申请号	US19610110673	申请日期	1961.05.17
申请人	ROYSTER ROBERT H	发明人	ROYSTER ROBERT H.
分类号	E21D15/20;F15B15/26;F16B1/00	主分类号	E21D15/20
代理机构		代理人
主权项
地址

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