Lehrzifferblatt zum Erlernen der 24-Stunden-Zeit,申请号DE1938T050952D-传众专利搜索

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发明名称	Lehrzifferblatt zum Erlernen der 24-Stunden-Zeit
摘要
申请公布号	DE683875(C)	申请公布日期	1939.11.17
申请号	DE1938T050952D	申请日期	1938.09.08
申请人	KARL TREFZGER	发明人	TREFZGER KARL
分类号	G09B19/12	主分类号	G09B19/12
代理机构		代理人
主权项
地址

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