Method of controlling multiple processes using finite state machines
CA 2136364 A1 · Owner: American Telephone And Telegraph Company · Inventors: Story, Guy Ashley; Schell, William Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of using finite state machines (FSMs) is disclosed for controlling multiple processes in response to input signals. In an exemplary embodiment, such processes comprise facilities for providing interactive television services and multimedia signals for such services. The FSMs are arranged in a treelike structure and communicate with each other by event messages of various types. Each FSM has multiple states and permitted state transitions. Transitions occur in response to event messages and/or input signals and a transition can cause one or, more event messages associated with such transition to be sent. At least one terminal FSM is associated with each of the multiple processes and …
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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 November 22, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 22, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2016.
- 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.