Marine navigational aid
CA 2174145 C · Owner: Smith, Darrel R. · Inventors: Smith, Loretta A.; Smith, Darrel R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
When navigating a water channel by boat it is preferred, and at times crucial, that the boat pass the channel buoys/markers on the proper side. The buoys/markers not only control the flow of marine traffic but also protect boaters from water hazards. While travelling upstream boaters should keep the green buoys on their port side and red buoys on their starboard side. Conversely while, travelling downstream, boaters should keep the green buoys on their starboard side and red buoys on their port side. This can be very confusing and in the case of an error it may result in very costly repairs and/or injuries. Boaters must continually be aware as to whether they are going upstream or …
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 May 24, 1996 and granted April 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 24, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 24, 2018.
- 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.