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发明名称
HEARING PROTECTION SYSTEM NOT INVOLVING LOSS OF HEARING CAPABILITY
摘要
申请公布号
CA861028(A)
申请公布日期
1971.01.12
申请号
CAD861028
申请日期
申请人
LEONARD R. KAHN
发明人
LEONARD R. KAHN
分类号
主分类号
代理机构
代理人
主权项
地址
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