E-mail paging system
CA 2213889 C · Owner: At&T Corp. · Inventors: Goldman, Shelley B.; Foladare, Mark Jeffery; Westrich, Robert S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
E-Mail messages transmitted over an E-Mail network are routed to an E-Mail server servicing the recipient, where useful E-Mail messages can be identified, separated from the junk mail and forwarded as directed by the, recipient. The E-Mail server sends a summary of the E-Mail message to the recipient over a different network so that the recipient can select a forwarding destination for the message. The recipient sends a selection signal to the E-mail server which then forwards the E-Mail message to the selected destination. The E-Mail message can be forwarded by the server over another network such as, the public telephone network, to a computer or a FAX machine at the recipient's office, …
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 19, 1997 and granted May 22, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 19, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 19, 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.