Direct to digital oximeter and method for calculating oxygenation levels
CA 2354064 C · Owner: Criticare Systems, Inc. · Inventors: Larsen, Michael T.; Reuss, James L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is an oximeter for non-invasive measuring the oxygen saturation in blood with increased speed and accuracy. The oximeter includes a number of features which increase the functionality of the device including a dynamic range control (62) for monitoring a range of inputs from low level signals encountered in fetal, and other applications to typical or high level signals; light emitting devices (70, 80, 100) of different wavelengths for filtering noise, and providing additional medial monitoring functions; and an improved method for calculating the oxygenation levels without the need to take peak and valley measurements. The device includes a sensor unit (20) which can …
Read the whole patent
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 December 1, 1999 and granted August 2, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 1, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 1, 2021.
- 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.