System and method for synchronizing operations among a plurality of independently clocked digital data processing devices
CA 3123687 C · Owner: Sonos, Inc. · Inventors: Millington, Nicholas A. J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tangible computer-readable memory having instructions stored thereon that when executed cause a zone player to: receive control inforniation frorn any one of a plurality of user interface modules; based on thc received control information enter into a synchrony group with a second zone player; and transmit status information to at least one of the plurality of user interface modules wherein the status information provides an indication of an operational status of the synchrony group.
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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 July 2, 2004 and granted August 8, 2023. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 2, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 2, 2026.
- 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.