TRAINER FOR TEACHING WORKING WITH TYPEWRITER KEYBOARD,申请号SU19792724766-传众专利搜索

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发明名称	TRAINER FOR TEACHING WORKING WITH TYPEWRITER KEYBOARD
摘要
申请公布号	SU777666(A1)	申请公布日期	1980.11.07
申请号	SU19792724766	申请日期	1979.01.05
申请人	SHENIN OLEG P,SU	发明人	SHENIN OLEG P,SU
分类号	G09B13/00;(IPC1-7):G09B13/00	主分类号	G09B13/00
代理机构		代理人
主权项
地址

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