Bar code for mail processing
CA 2202139 C · Owner: Canada Post Corporation · Inventors: Ulvr, Joseph Frank; Kho, Adrian Thong Sun Chai-Yu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bar code for mail pieces uses bars each of which has four possible states. Two different bars indicate the start of the code and the same two bars in the same order indicate the end of the code. A data content identifier (DCI) follows the start bars and this indicates the structure and length of the following data field (K1A0B1) so that when the code is read it will be recognized and read properly. The use of the data content identifier (DCI) allows the code to be used for different customer and Post Office applied applications in which the code structure length and content varies. The data , field may contain a postal code with or without an address locator a machine , ID, …
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 October 27, 1995 and granted December 26, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 27, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 27, 2017.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.