Improvements relating to optical projection apparatus,申请号GB19490019958-传众专利搜索

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发明名称	Improvements relating to optical projection apparatus
摘要
申请公布号	GB676644(A)	申请公布日期	1952.07.30
申请号	GB19490019958	申请日期	1949.07.29
申请人	WESTINGHOUSE BRAKE & SIGNAL COMPANY LIMITED;EDWARD ALFRED SHEPPARD;SYDNEY ARTHUR STEVENS	发明人
分类号	B61L5/18;G02B5/10	主分类号	B61L5/18
代理机构		代理人
主权项
地址

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