Auxiliary frame securing mechanism
CA 2235826 C · Owner: Contour Optik, Inc. · Inventors: Chao, David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An eyeglass device includes a primary frame having two side studs. Each of the studs has a recess therein. An auxiliary frame for disposing in front of the primary frame includes two sides each having a clamping member for engaging with a corresponding stud and for securing the auxiliary frame to the primary frame. Each of the clamping members includes a channel for engaging with the stud and each includes a spring member having one or more bulges for engaging with the stud and for securing the auxiliary frame to the primary frame. The bulges may engage with the recesses of the studs.
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 24, 1998 and granted March 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 24, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 24, 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.