Medical sensor with amplitude independent output
CA 2589039 A1 · Owner: Nellcor Puritan Bennett Incorporated · Inventors: Bernstein, Michael; Merchant, Adnan I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a medical sensor for detecting a blood characteristic. The sensor includes a transducer for producing an analog signal related, to the blood characteristic. The analog signal is converted into a transmission signal, which is in amplitude-independent form for transmission to a remote analyzer. In one, embodiment, a current-to-frequency converter converts a signal from a pulse oximeter, sensor into a frequency signal which can be transmitted over a transmission line to a, remote pulse oximeter.
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 November 22, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 22, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2016.
- 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.