A working model typewriter keyboard for practising,申请号GB19490024569-传众专利搜索

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发明名称	A working model typewriter keyboard for practising
摘要
申请公布号	GB694234(A)	申请公布日期	1953.07.15
申请号	GB19490024569	申请日期	1949.09.24
申请人	HAROLD HARDWICK	发明人
分类号	G09B13/02	主分类号	G09B13/02
代理机构		代理人
主权项
地址

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