Pulse oximetry motion artifact rejection using near infrared absorption by water
CA 2558643 C · Owner: Covidien Lp · Inventors: Baker, Clark R. Jr.; Debreczeny, Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for measuring physiological parameters obtaining a first signal derived from energy transmitted through a tissue portion at a first wavelength, said signal including a signal portion corresponding with motion-related events and a signal portion corresponding with arterial pulsation events, at the first wavelength water is a dominant absorber of electromagnetic energy in the tissue portion; obtaining a second signal derived from electromagnetic energy transmitted through a tissue portion at a second wavelength, said signal including a signal portion corresponding with motion-related events and a signal portion corresponding with arterial pulsation events, at …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed March 8, 2005 and granted July 23, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 8, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.