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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0403320 (1982-07-30) |
우선권정보 | GB-0024182 (1981-08-07) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 3 인용 특허 : 3 |
A helmet 1 adapted for use by hay fever sufferers is shaped to fit over the head and face of the wearer and has filtered air supplied to its interior by way of an air supply duct 5 from portable filter means remote from the helmet and adapted to be carried by the wearer. The filter means removes pol
In combination a helmet adapted for use by a hay fever sufferer and portable filter means remote from said helmet constructed and arranged to be carried by the helmet wearer and to supply filtered air to the interior of said helmet for the wearer to breath, said helmet comprising support means and a
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