Selective call receiver with a universal synchronization code operating mode
CA 2134233 C · Owner: Nelson, Leonard E. · Inventors: Nelson, Leonard E.; Mun, Kyung T.; Ganucheau, Charles J. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A selective call receiver (30) for receiving selective call signals in a universal synchronization code operating mode receives signals having the conventional POCSAG sync code and signals having dual sync codes and decodes the signals appropriately to recover personal and information services messages. Whether the receiver (30) is operating in a conventional POCSAG system or a dual sync code system, the receiver (30) conserves battery power by activating the high battery draining receiver circuit (34) only during frames (106) of the signal (100) wherein personal message addresses or database information is likely to appear. The frames (106) where the persmoal message addresses are …
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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 28, 1993 and granted October 12, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 28, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 28, 2015.
- 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.