Liver function testing apparatus
CA 1305222 C · Owner: Awazu, Kunio · Inventors: Kanda, Masahiko; Awazu, Kunio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liver function testing apparatus and method are disclosed in which light sources expose vital tissue to light of a first wavelength absorbed by specific dye dosed into blood of the vital tissue to be taken in and removed by the liver, and light of a second wavelength not absorbed by the dye. Optical pulses obtained from the vital tissue are received by a light receiving element the receiving output of which is sampled by an A-D converter to be converted into digital signals. Variable components in the blood included in the sampling outputs are determined as coefficients of linear functions to, perform biocalibration. A value correlated with specific dye concentration in the blood is …
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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 July 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 14, 2009.
- 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.