Eyeglass apparatus having auxiliary frame
CA 2235802 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 apparatus includes a primary frame having two side studs for pivotally coupling two legs thereto. An auxiliary frame for disposing in front of the primary frame includes two sides each having an extension for engaging with an outer portion of the adjacent leg. Each of the extensions may include a magnet for engaging with another magnet mounted in the adjacent leg or with a magnetic leg and for securing the auxiliary frame to the primary frame. Each of the extensions may include a clamping member for securing to the legs without the use of magnets.
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 February 26, 2002. 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.