Lighting system
CA 2201795 C · Owner: Nakahigashi, Fumitaka · Inventors: Nakahigashi, Fumitaka; Sasaki, Tohru; Hirano, Koki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to a small-size and light-weight lighting system of the plane-emitting type or line-emitting type. In a lighting system in which light is let in from one side surface of a light guiding plate and emitted from a front surface of the light guiding plate all over the surface, the small-size and light-weight lighting system of plane-emitting type can be obtained by arranging a light guiding rod in a position opposite to the one surface of the light guiding plate and by connecting the light guiding rod to an optical fiber connected to a light source. In a lighting system in which light is let in from one end of a light guiding rod and emitted from a side surface …
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 April 4, 1997 and granted January 30, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 4, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 4, 2019.
- 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.