Moving platform position determination system and method
CA 2533834 C · Owner: Hoctor, Ralph Thomas · Inventors: Hoctor, Ralph Thomas; Davenport, David Michael; Hershey, John Erik
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system and method for determining a position of a moving platform (100) are provided. The method includes transmitting a carrier signal from one of the moving platform and a stationary platform (150) receiving a received signal , at the other of the moving and stationary platforms deriving a frequency , shift between the carrier signal and the received signal and calculating the , apparent closing velocity using the frequency shift and frequency of the carrier signal.
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 July 14, 2004 and granted November 13, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 14, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 14, 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.