Electric machine system
CA 2113579 C · Owner: Klatt, Frederick W. · Inventors: Klatt, Frederick W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electric machine system includes a number of improvements that heighten the performance provided by the system. In particular the electric machine system may include bypass capacitors for filtering and storage. Further, the electric machine system may include bidirectional power switches for coupling different phase current signals to respective windings in the electric machine system. These switches control which phase signals are connected to the respective windings of the electric machine system.
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 July 1, 1992 and granted January 2, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 1, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 1, 2014.
- 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.