Ultrasonic imaging system
CA 2097531 C · Owner: Matsushita Electric Industrial Co. Ltd. · Inventors: Akaishi, Satoshi; Nakamura, Yasuhiro; Akiyama, Hisashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ultrasonic imaging system comprises an ultrasonic probe for transmitting and receiving an ultrasonic wave, driver unit for driving the ultrasonic probe, detector unit for detecting an echo signal received by the ultrasonic probe, filter unit being operative to pass a detection signal from the detector unit and having a plurality of passbands which have respective flat frequency response characteristics and respective gains different from each other scanning, conversion unit for converting the detection signal which has passed through the filter unit to a display, signal to be displayed on a television etc. and, display unit receiving the display signal from the scanning conversion unit …
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 June 2, 1993 and granted May 20, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 2, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 2, 2015.
- 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.