Bifocal reading lens height compensator
CA 2090894 A1 · Owner: Nacar, Ernesto M. · Inventors: Nacar, Ernesto M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a pair of bifocal eyeglasses, which has a means to elevate the frame from a normal position, to an elevated position. This would allow as nearsighted person to use the reading lens to see overhead or elevated objects, clearly and comfortably without putting a, strain on their neck. This is accomplished by attaching a small shaft with wire legs of equal length, to the frame bridge. At the end of each leg is a nose pad which rests on the person's nose brige. To move to an elevated position support and lift, the frame bridge, with the index finger and then push with a, light motion toward the centre of the eyebrows. To return to normal position, simply press …
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 March 3, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 3, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 3, 2015.
- 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.