Key input device
CA 2325356 C · Owner: Kyocera Corporation · Inventors: Okuda, Tatsumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
17, A key input device comprises a dome sheet 7 provided over a base plate 5 and having a plurality of dome portions, and a plurality of manual keys disposed above the dome sheet 7. Each of the dome portions is elastically restorably inverted by being depressed by the corresponding manual key to close contacts. The plurality of the manual keys described include a seesaw key 15 with a pivotal pin 15a, and the dome sheet 7 has a flat sheet portion 70 formed around the dome portions and comprising an inner region 74 extending inwardly of dome portions 72 to be selectively depressed by a seesaw key 15, and an outer region 73 extending outwardly of the dome portion 72. A spacer sheet 6 is …
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 November 8, 2000 and granted May 6, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 8, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 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.