Handheld obstacle penetrating motion detecting radar
CA 2129076 C · Owner: Frazier, Lawrence M. · Inventors: Frazier, Lawrence M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A motion detection radar system that is adapted to produce radar warning signals regarding the presence of moving objects that are located behind structural barriers and the like is comprised of a low power frequency tunable continuous wave transmitter and antenna, a receiver, an FM transmitter and antenna and a, handheld remote FM receiver. The radar system may be adapted to operate at any frequency from 600 MHz to 1.2 GHz. The motion detecting radar system uses a technique for measuring the changes in phase difference and the rate of change of phase differences detected thereby. The receiver captures the total energy reflected from all reflective objects within the antenna field of view …
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 28, 1994 and granted July 1, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 28, 2016.
- 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.