Projection apparatus,申请号US19270186206-传众专利搜索

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发明名称	Projection apparatus
摘要
申请公布号	US1766102(A)	申请公布日期	1930.06.24
申请号	US19270186206	申请日期	1927.04.25
申请人	KARL BRENKERT;BRENKERT JOSEPH W	发明人	BRENKERT KARL;BRENKERT JOSEPH W.
分类号	G03B21/20	主分类号	G03B21/20
代理机构		代理人
主权项
地址

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