Keyboard mounting mechanism
CA 2263448 C · Owner: Weber Knapp Company · Inventors: Pangborn, Donald R.; Kerl, Peter J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mechanism for mounting a keyboard supporting surface on a base including a linkage for mounting the surface for vertical swinging movement relative to the base and for vertical tilting movement relative thereto, a lock device for simultaneously locking the surface against swinging and tilting movements a, counterbalance spring for opposing downwardly directed swinging movement of said surface and a return spring for opposing downwardly directed tilting movement of said surface.
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 13, 1998 and granted November 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 13, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 2020.
- 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.