Integral vertical plane adjusting mechanism for an eyeglass frame with multifocal lenses
CA 2276938 A1 · Owner: Negishi, Tohru · Inventors: Negishi, Tohru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An eyeglass frame includes a pair of rims in which a corresponding pair of bifocal lenses are mounted and a pair, of temples connected to the respective rims. Each of the temples includes a joint secured to a corresponding one of the rims, a leg having one end connected to the joint and the other end resting behind a wearer's ear and a mechanism, for enabling pivotal movement between the joint and the leg in a vertical plane so as to permit movement of the bifocal lenses between a normal position and an elevated. or reading position. The mechanism is so constructed as to decrease the distance between a first point at which the joint is connected to the rim and a second point at which the …
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 5, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 5, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 5, 2021.
- 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.