Dc motor with ferrite permanent magnet field poles
CA 1181119 A · Owner: Fujitsu Fanuc Limited · Inventors: Amemiya, Yoichi; Sogabe, Masatoyo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A DC motor having magnetic field poles made of ferrite permanent magnets and an armature rotatably arranged inside of the magnetic field poles, wherein the inner surface of the magnetic field poles facing the surface of the armature are covered with thin iron plates.
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
- Granted January 15, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 2002.
- 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.