A device for generating a variable magnetic field
CA 2385508 A1 · Owner: Magnetic Solutions (Holdings) Limited · Inventors: Coey, John Michael David; Hurley, David Patrick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device (1) for generating a variable composite magnetic field comprises top and bottom concentric ring members (3, 4) which define a main central axis (5) and a central area (4) within which the composite magnetic field is formed. Rod-like permanent magnets (18) are located within respective annuli (15) of the respective ring members (2, 3), and are equi-spaced circumferentially along a pitched circle (21). The permanent magnets (18) are rotatable about corresponding secondary axes (19) which extend parallel to each other and parallel to the main central axis (5). The permanent magnets (18) are magnetised with their respective direction of magnetisation extending transversely of …
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 September 21, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 21, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 21, 2022.
- 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.