Projection system and projector
CA 2333195 C · Owner: Yoneno, Kunio · Inventors: Yoneno, Kunio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A projection system comprising a projection unit for projecting light of an image onto a preset projection portion an imaging unit for imaging the , projected image by the projection unit and a processing unit for performing a preset processing based on the imaging result by the imaging unit wherein an , imaging lens of the imaging unit is disposed outside a reflection region for receiving direct reflection light of the projected image light.
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 March 21, 2000 and granted July 22, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 21, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 2022.
- 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.