Computer
CA 2442032 A1 · Owner: Sexton, Barbara · Inventors: Sexton, Barbara
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A computer keyboard arrangement has keys formed on one or more transparent sheets. A light distributing sheet extends beneath the keyboard sheet(s) and is illuminated by light from at least one light-emitting diode located laterally thereof. The sheets are sealed into a casing of the arrangement to prevent ingress of moisture into the casing. The keys may be illuminated by light of different colours such that respective sets of indicia are rendered visible thereon. The underside of the casing of the keyboard arrangement is shaped for conformity with a pair of human legs to facilitate stable laptop , operation.
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 26, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 26, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 2024.
- 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.