Method and system for establishing and maintaining user-controlled anonymous communications
CA 2264912 C · Owner: Walker Digital, Llc · Inventors: Case, T. Scott; Walker, Jay S.; Schneier, Bruce
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for establishing anonymous communications includes a plurality of party terminals (300), a plurality of requestor terminals (400) and a central , controller (200). The system receives and stores party data about respective parties. Upon receiving criteria for parties of interest from a requestor terminal (400) and authorization from respective parties the central , controller (200) releases to the requestor party associated with the parties. The system also establishes communication channels between parties and the requestor, while maintaining their anonymity. Communications are through the public switched telephone network (110).
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 September 5, 1997 and granted November 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 5, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 5, 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.