Synchronous machine
CA 2033170 C · Owner: Nakano, Kazuo · Inventors: Nakano, Kazuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A synchronous machine comprising an armature having n poles and a field constituted by a plurality of permanent magnets, said permanent magnets having n - 1 poles which can provide a magnetic field by rotating relatively to said armature, and being arranged in such a way that they are magnetized along the peripheral direction and at the same time inclined the axis of the aforementioned rotary motion.
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 June 1, 1990 and granted January 27, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 1, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 1, 2012.
- 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.