Bulk-shaped lens, light-emitting unit, lighting equipment and optical information system
CA 2380356 C · Owner: Minato, Akihisa · Inventors: Tamaoki, Satoshi; Ohta, Hirao; Minato, Akihisa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bulk lens such as of a shell shape or an egg shape comprising a bulk lens , body having a top part a bottom part and an outer side part, and a wellshaped recess provided in the lens body from the bottom part toward the top part. A ceiling part of the recess functions as a first lens surface the top , part of the lens body functions as a second lens surface and the interior of , the recess functions as the housing section where a light source or a photodetector is housed.
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 26, 2000 and granted January 18, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 26, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 26, 2022.
- 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.