Ultrasonic doppler diagnostic device
CA 1232670 A · Owner: Aloka Co. Ltd. · Inventors: Namekawa, Kouroku; Harada, Akimitsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ultrasonic diagnostic device for measuring the velocity of blood flow within a living body comprises a transmitter for transmitting an ultrasonic wave into the body, a receiver for amplifying the part of the ultrasonic wave reflected from the body, converting it into an electric signal and amplifying the signal in accordance with a logarithmic amplification characteristic a converter, circuit which receives the amplified signal from the receiver and a reference signal from the transmitter and outputs a signal corresponding to the ratio of the component of the reflected ultrasonic wave attributable to the blood flow and the component thereof attributable to the wall of the blood vessel …
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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
- Granted February 9, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 9, 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.