Gravity actuated spiral track device,申请号US19500193429-传众专利搜索

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发明名称	Gravity actuated spiral track device
摘要
申请公布号	US2634128(A)	申请公布日期	1953.04.07
申请号	US19500193429	申请日期	1950.11.01
申请人	REED LAWRENCE E	发明人	REED LAWRENCE E.
分类号	A63F7/36	主分类号	A63F7/36
代理机构		代理人
主权项
地址

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