Systems and methods for authenticating an electronic message
CA 2386484 A1 · Owner: United States Postal Service · Inventors: Campbell, Leo J.; Schoen, Isadore; Mcgrath, Michael J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Systems and methods are disclosed for authenticating electronic messages. A data structure is generated by a computer server which allows for the authentication of the contents and computer server identity of a received electronic message and provides a trusted stamp to authenticate when the message was sent. Data which can authenticate the message the computer server , identity, and the time the message was sent is included into a data structure which is called an Electronic PostMark (EPM).
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 October 2, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 2, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 2022.
- 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.