Key input device
CA 2531730 C · Owner: Panasonic Corporation · Inventors: Harada, Hideki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A key input device includes a key input unit and an illuminating unit. The key input unit has a key cap movable mechanism, pressure sensing part and a frame housing these components. The illuminating unit illuminates the key cap from the bottom of this key input unit through the movable mechanism and the pressure sensing part. The key input unit and the illuminating unit are configured in such a way that they are independently waterproofed.
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 28, 2005 and granted April 2, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 28, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.