Manually driven portable steering propeller,申请号US19470794489-传众专利搜索

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发明名称	Manually driven portable steering propeller
摘要
申请公布号	US2487195(A)	申请公布日期	1949.11.08
申请号	US19470794489	申请日期	1947.12.30
申请人	STEPHENS JOSEPH F	发明人	STEPHENS JOSEPH F.
分类号	B63H16/20	主分类号	B63H16/20
代理机构		代理人
主权项
地址

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