Method of testing the accuracy of pulse oximeters & device therefor
CA 2041177 C · Owner: Volgyesi, George Andrew · Inventors: Volgyesi, George Andrew
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Device and method for testing the accuracy of pulse oximeters used in estimating arterial blood saturation levels. The device is for use in enabling a pulse oximeter to measure the absorption of the radiation emitted by said oximeter by a pulsatile liquid contained within said device, which device comprises said liquid a resiliently, flexible displaceable member adjacent said liquid and means for operably effecting rhythmic movement of said displaceable member with a steady frequency and amplitude so as to effect a change in the depth of a volume of said liquid in the direction acted upon by said radiation such that said liquid is operably provided in pulsatile form while under the …
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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 April 25, 1991 and granted March 5, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 25, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 25, 2013.
- 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.