Motion-picture apparatus,申请号US19280326900-传众专利搜索

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发明名称	Motion-picture apparatus
摘要
申请公布号	US1802248(A)	申请公布日期	1931.04.21
申请号	US19280326900	申请日期	1928.12.18
申请人	GEYER ROY M;SWEET CHARLES M	发明人	GEYER ROY M.;SWEET CHARLES M.
分类号	G03B21/50	主分类号	G03B21/50
代理机构		代理人
主权项
地址

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