Bioimpedance measurement using controller-switched current injection and multiplexer selected electrode connection
CA 2450968 C · Owner: Smith, Kenneth Carless · Inventors: Smith, Kenneth Carless; Ironstone, Joel Steven; Zhang, Frank
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system and method for measuring a voltage in a body part are described. The system includes a multiplexing unit and N body leads for electrically connecting the multiplexing unit to the body part. The system also includes a controller switching unit for allowing a current to flow through the body part between two body leads n1 and n2 of the N body leads, and a resultant voltage to be measured between two body leads n3 and n4 of the N body leads, where n1 ~ n2 and n3 ~ n4 but where n1 n2 n3 and n4 need not otherwise be distinct.
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 27, 2003 and granted January 7, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 27, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 27, 2025.
- 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.