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发明名称
Korvatulppa käyttäjän ja ympäristön väliseen melulta suojattuun kommunikaatioon
摘要
申请公布号
FI94921(B)
申请公布日期
1995.08.15
申请号
FI19890002116
申请日期
1989.05.03
申请人
RASMUSSEN, STEEN B.
发明人
RASMUSSEN, STEEN B.
分类号
H04R1/10;A61F11/08;H04M1/05;H04R1/00;H04R1/46;(IPC1-7):A61F11/08;H04R25/02
主分类号
H04R1/10
代理机构
代理人
主权项
地址
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