Rotary flexible propeller,申请号US19270243732-传众专利搜索

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发明名称	Rotary flexible propeller
摘要
申请公布号	US1798299(A)	申请公布日期	1931.03.31
申请号	US19270243732	申请日期	1927.12.30
申请人	UGO ANTONI	发明人	ANTONI UGO
分类号	B64C11/30	主分类号	B64C11/30
代理机构		代理人
主权项
地址

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