TWO WAY AUDIO SAFETY AND COMMUNICATION SYSTEM FOR MECHANICALLY OPERATED DOORS,申请号GB19900014042-传众专利搜索

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发明名称	TWO WAY AUDIO SAFETY AND COMMUNICATION SYSTEM FOR MECHANICALLY OPERATED DOORS
摘要
申请公布号	GB9014042(D0)	申请公布日期	1990.08.15
申请号	GB19900014042	申请日期	1990.06.23
申请人	BENTALL JOHN C	发明人
分类号		主分类号
代理机构		代理人
主权项
地址

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