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Expired Canadian patentCanada

Method and apparatus in a radio messaging system for forming a current frame of data while maintaining a correct transmission order for numbered messages

CA 2235568 C · Owner: Couts, Jeffrey D. · Inventors: Phillips, W. Garland; Couts, Jeffrey D.

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

A processor (208) selects a candidate message (214) from a message queue (212), and tests (306) whether an available space (216) in the current frame of data is sufficient to accommodate the candidate message. The processor records (320, 420) a skip indicator (218 220) into a, predetermined memory location in response to the candidate message, being a numbered message and the available space in the current frame being insufficient. The processor skips (316) the candidate message during the current frame even though available space is sufficient when, the skip indicator is recorded in the predetermined memory location and is applicable to the candidate message. The processor adds (332) the …

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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 April 22, 1998 and granted July 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 22, 2018.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 22, 2020.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 22, 1998
GrantedJuly 18, 2000
Term endedApril 22, 2018
Patent numberCA 2235568 C
Classification (IPC)H04W88/18

Timeline

Timeline From CIPO dates

1999200120032005200720092011201320152017Application filedApril 22, 1998Patent grantedJuly 18, 2000Term endedApril 22, 2018

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