Method for verifying the expected postage security device and its status
CA 2221673 C · Owner: Pitney Bowes Inc. · Inventors: Ryan, Frederick W. Jr.; Cordery, Robert A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A secure and reliable method for verifying in the host system that the expected PSD is coupled to the host system includes generating a random number in the host system and encrypting the random number with a PSD state identification, number. The encrypted random number is then sent to the PSD. The PSD decrypts the encrypted random number received using the PSD state identification number and sends the decrypted random number to the host system. The host system compares the decrypted random number received from the PSO to the random number generated in the host system. If they are the same the host system has, verified the expected PSD and has also verified that the PSD has not completed …
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 November 20, 1997 and granted September 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 20, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 20, 2019.
- 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.