Blood flow measurement device and method
CA 1236912 A · Owner: Quinton Instrument Company · Inventors: Albert, David E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The disclosure relates to systems for measuring blood flow by detecting Doppler shift of ultrasound reflected by blood components moving in a blood vessel. The systems employ electronic techniques for providing accurate tracking of portions of the frequency spectra of Doppler shift signals to determine peak and mean velocity and acceleration.
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
- Granted May 17, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 17, 2005.
- 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.