| http://www.w3.org/ns/prov#value | - Within the housing there is a transducer and microprocessor-based circuitry for generating standard exhaled air performance measurements such as forced expiration volume and peak expiratory flow rate, commonly referred...http://www.google.com/patents/US5137026?utm_source=gb-gplus-sharePatent US5137026 - Personal spirometerAdvanced Patent SearchPublication numberUS5137026 APublication typeGrantAppl
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