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发明名称
EAR WAX BARRIER AND ACOUSTIC ATTENUATOR FOR HEARING AID
摘要
申请公布号
CA2018732(A1)
申请公布日期
1990.12.12
申请号
CA19902018732
申请日期
1990.06.11
申请人
BELTONE ELECTRONICS CORPORATION
发明人
WEISS, ERWIN M.;STANTON, MARK F.
分类号
A61F11/00;H04R25/02
主分类号
A61F11/00
代理机构
代理人
主权项
地址
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