Optical sensing device for detecting optical features of valuable papers
CA 2646498 C · Owner: Okamoto, Kazuhiko · Inventors: Seki, Toru; Nago, Tokimi; Okamoto, Kazuhiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical sensing device for detecting optical features of valuable papers is disclosed. The device contains a triplex assembly opposed to a passageway for guiding the transported valuable paper. The triplex assembly has two light emitting elements for emitting first and second lights of the different wavelengths from each other and a light receiving element for receiving the first and second lights reflected on the valuable paper at the different points in time. The triplex assembly also has a case for accommodating the light emitting elements and light receiving element in the fixed positions.
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 December 26, 2003 and granted January 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 26, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 26, 2025.
- 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.