Paddle with buoyancy
CA 1213789 A · Owner: Ting, Ea-Lu · Inventors: Ting, Ea-Lu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a paddle for propelling kayak or small boat it is, known to have two buoyancy compartments one at each end of, the paddle, a tubular-shaped section connected to the outward end of each buoyancy compartment, and a common shaft connected to the inward ends of the two buoyancy compartments to form a double-ended paddle. This newly invented paddle is held with two hands in the same manner as the conventional paddle. But the propulsion is produced by the horizontal resultant force of the buoyancy force and the water resistance when the paddle is pushed toward the back of the kayak.
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
- Granted November 12, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 2003.
- 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.