Gear drive for cinematographic projectors,申请号US19270203041-传众专利搜索

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发明名称	Gear drive for cinematographic projectors
摘要
申请公布号	US1783340(A)	申请公布日期	1930.12.02
申请号	US19270203041	申请日期	1927.07.02
申请人	OLIVER ELWYN E	发明人	OLIVER ELWYN E.
分类号	G03B19/18	主分类号	G03B19/18
代理机构		代理人
主权项
地址

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