Keyboards
CA 2551626 C · Owner: Purcocks, Dale Mcphee · Inventors: Purcocks, Dale Mcphee
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A switch comprising a generally tubular housing (10) of a rigid plastics material. A plurality of discrete tabs (12) are circumferentially disposed in , side-by-side relation, around an end of the housing (10). The housing (10) defines a recess (16) for receiving an elastomeric dome member (24) having an annular rib (26) at its base and the recess (16) has an annular groove (20) with a relatively sharp edge (22) for receiving the annular rib (26) of the dome member (24). When the dome member (24) is correctly inserted within the recess (16) a downward force , is provided on the tabs (12) causing them to 'fold' down , over the base of the dome member (24) such that they are , …
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 6, 2004 and granted January 23, 2018. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 6, 2024.
- 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.