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发明名称
AUXILIAR SPEAKING APPARATUS FOR THROAT-OPERATED PERSONS
摘要
申请公布号
YU34676(A)
申请公布日期
1982.05.31
申请号
YU19760000346
申请日期
1976.02.13
申请人
KUHN & CO.GMBH.
发明人
SICKEL HELMUT;SICKEL HELMUT
分类号
A61F2/20;(IPC1-7):H04R11/00
主分类号
A61F2/20
代理机构
代理人
主权项
地址
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