Person-centric account-based digital signature system
CA 2417922 C · Owner: Wheeler, Lynn Henry · Inventors: Wheeler, Lynn Henry; Wheeler, Anne M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a method of managing a database of existing accounts (214) for account holders (202), each account holder (202) has multiple accounts with one or more account authorities (212) for use of a single device with multiple accounts, with each account of each account holder being associated with a public key of a public-private key pair of that accuont holder. A record of information pertaining to all accounts of a particular account holder is maintained in a central location by a central key authority. The information for that account includes the public keys of that account holder. The central key authority transfers information from the record for an account holder to a new account …
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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 6, 2001 and granted March 12, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 6, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 6, 2023.
- 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
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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.