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发明名称
Schreibtafel und Verfahren zu deren Herstellung.
摘要
申请公布号
CH200393(A)
申请公布日期
1938.10.15
申请号
CHD200393
申请日期
1938.02.01
申请人
WYSSEN ERNST SEN.
发明人
SEN. WYSSEN ERNST
分类号
B43L1/10
主分类号
B43L1/10
代理机构
代理人
主权项
地址
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