A method of timing calibration
CA 2324798 A1 · Owner: Barroso, Christopher Burke · Inventors: Barroso, Christopher Burke; Chen, Byron Hua; Vannucci, Giovanni
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Dislosed is a method for deriving accurate global positioning satellite (GPS) timing by calibrating frame boundaries to GPS timing. Time calibration is achieved by, determining a time difference .DELTA.~ between a reference GPS time (or pulse) and an ~th frame, boundary. The time difference .DELTA.~ and a frame boundary identifier specifying the ~th frame, boundary are provided to a device equipped with a full or partial GPS receiver so that the GPS, equipped device may synchronise itself to GPS timing. Upon synchronizing itself to GPS timing, the GPS equipped device may search for GPS signals using information by a geographical location server, e.g. WAG server.
Read the whole patent
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 October 30, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 30, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 2022.
- 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.