Armature having a flat disk type commutator
CA 2073949 C · Owner: Takasaki, Junichi · Inventors: Takasaki, Junichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an armature wherein a plurality of base metals 15 electrically insulated from one another are solidly secured to the surface of a boss portion 10 carbon, protective members 18 are pointed to the surfaces of the base metals 15, respectively, through a solder layer 19 and coil ends 5 of an armature core are pointed to the risers, an auxiliary electrode portion 17 is formed integrally with the riser 12 on each of the base metals 15.
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 15, 1992 and granted January 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 15, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 15, 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.