Underwater detecting device
CA 2067358 C · Owner: Furuno Electric Company, Limited · Inventors: Nishimori, Yasushi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an underwater detection system which searches the water in a wide range of directions and displays moving targets in different colors depending on speeds of the targets. An underwater detection system according to the present invention comprises ultrasonic transmitting means (101) for radiating a search pulse having a carrier frequency in a wide range of directions ultrasonic, receiving means {1p, 1q) for successively searching areas in mutually different directions in the wide range of directions to receive ultrasonic signals coming from each of respective directions therein at least two times phase, difference detecting means (10, 12) for detecting a phase …
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 August 9, 1991 and granted May 1, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 9, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 9, 2013.
- 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.