Device for securing a mouse ball
CA 2174992 C · Owner: Perry, Robert C. · Inventors: Perry, Robert C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A computer mouse comprises a housing having a bottom wall that defines an opening, a retainer plate fitted in the opening and formed with a circular hole, and a mouse ball in the housing and projecting through the circular hole. A seal adheres to both the bottom wall of the housing and the retainer plate whereby, removal of the retainer plate from the opening is resisted.
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 April 25, 1996 and granted June 13, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 25, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 25, 2018.
- 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.