IMPROVEMENTS IN OR RELATING TO PORTABLE CROSSING SIGNS,申请号GB19690005067-传众专利搜索

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发明名称	IMPROVEMENTS IN OR RELATING TO PORTABLE CROSSING SIGNS
摘要
申请公布号	GB1292052(A)	申请公布日期	1972.10.11
申请号	GB19690005067	申请日期	1969.01.29
申请人	HILLS (PATENTS) LIMITED	发明人	ARTHUR NORMAN SEARL
分类号	G08B5/00;G09F13/04	主分类号	G08B5/00
代理机构		代理人
主权项
地址

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