Spring powered boat motor
CA 2286496 C · Owner: Sahounov, Nikola · Inventors: Sahounov, Nikola
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A nonresonant boat motor for imparting motion to a boat without generating a substantial level of sound. The nonresonant boat motor includes a spiral spring coupled to an axle assembly a, propeller shaft coupled to the axle assembly a ratchet assembly for, providing tension in the spring and an axle rotation control, assembly.
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 14, 1999 and granted December 19, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 14, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 14, 2021.
- 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.