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发明名称
Protective helmets
摘要
A protective helmet incorporates a visor retractable therewithin, a fan for providing filtered airflow through a duct within the shell to the visor, and ear defenders mounted substantially within the profile of the shell.
申请公布号
US5283914(A)
申请公布日期
1994.02.08
申请号
US19920959103
申请日期
1992.10.09
申请人
COAL INDUSTRY (PATENTS) LIMITED
发明人
JAMES, GRANVILLE C.
分类号
A42B3/16;A42B3/22;A42B3/28;A62B18/04;(IPC1-7):A42B3/00
主分类号
A42B3/16
代理机构
代理人
主权项
地址
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