Spectacles with tiltable lenses
CA 1047809 A · Owner: Choy, Angelo L. · Inventors: Choy, Angelo L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Lens holder supporting lens frames in spectacles are connected to a rotatable shaft mounted within a main supporting frame. Snap-on covers or braces are provided in the main supporting frame and have downwardly extending ribs forming a groove for the receiption of the rotatable shaft. The snap-on covers or braces are spaced from each other to allow for the mounting of the lens holder in the main supporting frame, the main supporting frame being provided with a groove for allowing the lens holder to rotate with the shaft.
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
- Granted February 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 6, 1996.
- 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.