Athletic shoe with energy storing spring
CA 1338231 C · Owner: Wilson Sporting Goods Co. · Inventors: Crowley, Kevin J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An athletic shoe includes a spring in the midsole of the shoe. The spring is generally oval-shaped and includes convex top and bottom walls and a laterally extending opening. The spring is molded from high tensile material such as graphite fibers and resin, kevlar fibers and resin glass fibers and, resin, or ceramic materials.
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 April 9, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 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.