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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0809302 (1977-06-23) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 11 인용 특허 : 0 |
In a spirometer, a breath transmission passage has first and second ends open to the atmosphere and a restriction between the first and second ends. An elongated conduit has a first port at one end, a second port at the other end, and a third port intermediate to the first and second ports to form a
Fluid measuring apparatus comprising: a housing having an elongated cavity enclosed on its sides; a first thin elongated hot wire bent in half to extend along the length of the cavity away from a junction; a second thin elongated hot wire bent in half to extend along the length of the cavity away fr
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