Apparatus for controlling a power supply of an electric machine in a vehicle
CA 2021066 C · Owner: Nec Corporation · Inventors: Fujiwara, Ryuhei
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electric machine such as a telephone set a, facsimile machine, etc. installed in a vehicle is supplied with an electric power from a power supply. The power supply is a battery which is charged from a generator driven by an engine of the vehicle when the, engine is rotated. On the other hand the power supply, is a secondary battery which is charged from the battery, when the engine is not rotated.
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 12, 1990 and granted August 9, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 12, 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.