Method and system for enhancing security and for audit and control of cryptographic verifier
CA 2245083 C · Owner: Pitney Bowes Inc. · Inventors: Pintsov, Leon A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cryptographic method where items, such as mail pieces are, verified for authenticity includes determining a predetermined number of items selected for verification during a given period and maintaining a count of the number of items verified. The predetermined number is compared with the number of items verified. The verification process may continue if a match occurs and may be stopped if a match does not occur. The verifier includes means for inputting data relating to an item to be verified and access counter means for counting the number of items verified.
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 August 14, 1998 and granted February 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 14, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 14, 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.