Games and puzzles
CA 2190980 C · Owner: Wood, Mark Thornton · Inventors: Wood, Mark Thornton; Dyksterhuis, Francis Henry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A game or puzzle including a plurality of polyomino pieces which have the obverse sides and reverse sides marked with different markings, there being at least three markings in total on the obverse and reverse sides of the pieces. The pieces may be assembled using both sides into different arrays of eight by eight squares defining checkerboard patterns for use in playing the game of chess or checkers. The pieces may also be assembled into a cube comprising four by four by four squares.
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 31, 1995 and granted April 17, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 31, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 31, 2017.
- 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.