Coding systems
CA 2289554 A1 · Owner: Edwards, David Brian · Inventors: Edwards, David Brian
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 the use of machine-readable coded markings carried by the articles to identify not only what they are made of but also what colour they are and what they were previously used for (what they contained). The invention proposes that a coded marking could be formed integrally of the article (15) in the form of a sequence (or similar arrangement) of areas (33) having significantly contrasting light reflecting/scattering properties actually incorporated on/in the article's surface, and that this marking be in the form of a modified AZTEC code in which each of the coding elements - the blocks (33) that together with the , "empty" spaces therebetween define …
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 June 5, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 5, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 2020.
- 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.