최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0304240 (1989-01-31) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 140 인용 특허 : 3 |
A filtration device having a housing which may be attached to and supported by the temple of a set of spectacles worn by a wearer. The filtration device is operable to filter air inhaled through the nostril of the wearer, and comprises a generally elongated housing having a length about equal to or
A filtration device having housings which may be attached to and supported by the temples of a set of spectacles worn by a wearer, said filtration device being operable to filter air inhaled through the nostrils of said wearer, said filtration device comprising: two generally elongated housings each
※ AI-Helper는 부적절한 답변을 할 수 있습니다.