Epl price change verification system and method
CA 2238107 C · Owner: Goodwin, John C. Iii · Inventors: Goodwin, John C. Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A price change verification system and method for an electronic price label (EPL) system which verifies that price changes have been implemented by associated EPLs. A storage medium contains a record associated with the EPL. The record includes a price change time and a new price for the EPL. An EPL computer sends a price change message containing the new price to the EPL at a time substantially equal to the price change time. The EPL computer additionally verifies that the EPL is displaying the new price by reading the record to determine the price change time, obtaining a currently displayed price from the EPL and, comparing the currently displayed price to the new price.
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 May 20, 1998 and granted November 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 20, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 20, 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.