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Expired Canadian patentCanada

Handheld electronic device and associated method providing time data in a messaging environment

CA 2736075 C · Owner: Blackberry Limited · Inventors: Klassen, Gerhard D.; Wormald, Christopher R.; Kuhl, Lawrence E.

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

An improved handheld electronic device and an associated method are provided in which time data regarding certain aspects of a messaging conversation on a handheld electronic device are made available to a user. Such time data is provided for instance, in situations where an interruption has occurred during a messaging conversation. Time data can also be provided to a user on demand in certain circumstances.

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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 September 20, 2004 and granted April 8, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 20, 2024.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 20, 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.
FiledSeptember 20, 2004
GrantedApril 8, 2014
Term endedSeptember 20, 2024
Patent numberCA 2736075 C
Classification (IPC)H04W4/12 +1 more

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedSep 20, 2004Patent grantedApril 8, 2014Term endedSep 20, 2024

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.