Method for efficient roaming among communication systems
CA 2232300 C · Owner: Eaton, Eric Thomas · Inventors: Lockhart, Robert Kennon; Eaton, Eric Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A communication system (100) for providing messages to a pager (140) includes a first sub-system (105) having a home terminal (125) for normally transmitting the messages to the pager (140) in a first geographic region. The communication system (100) also includes a second sub-system (115) having a local terminal (135) for transmitting the messages to the pager (140) when the pager (140) has roamed into a second geographic region. The local terminal (135) of the second sub-system (115) includes a data port (505) for receiving a message for transmission to the pager (140) a controller (510) for , determining that the pager is roaming and a requester (580) for automatically …
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 July 15, 1996 and granted October 3, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 15, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 15, 2018.
- 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.