Electromagnetic coil configurations for power transmission through tissue
CA 2271822 C · Owner: Light Sciences Limited Partnership · Inventors: Brown, David J.; Huston, Darrin; Wilkerson, Brian D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for improved transcutaneous power transfer efficiency comprises a transmitter coil (20) applied to the outer surface of a cutaneous layer (24) on a patient's body by adhesive tape or other appropriate supporting material and a receiver coil (22) implanted inside the patient's body. The transmitter coil and receiver coil include cores (28 42) having pole faces (26a, 26b, 40a, 40b) with a substantially larger area than the cross section of the core at other locations. In addition, the core of the receiver coil (42) is substantially shorter than that of the transmitter coil (28) so that the lines of flux (54) produced by the transmitter coil tend to pass through the pole faces …
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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
- Filed September 26, 1997 and granted April 23, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 26, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 26, 2019.
- 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.