Spectacles and spectacles set
CA 2454178 A1 · Owner: Sunreeve Co. Ltd. · Inventors: Nishioka, Takahiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Spectacles are provided comprising a frame and lenses that are mounted in this frame, wherein the frame comprises an engagement holding mechanism near its middle when viewed from the front, for holding the lenses by engaging a mating component provided to the lenses; and an attraction holding mechanism near the two ends of the frame when viewed from the front for holding the , lenses by magnetic force. As a result the lenses can be securely held and , easily attached to and removed from the frame without compromising the , aesthetic design of the spectacles.
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 July 16, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 16, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 16, 2024.
- 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.