Apparatus and method for determining the position of a football during a football game
CA 2068669 A1 · Owner: Snowden, James D. · Inventors: Snowden, James D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for determining the position of a ball on a playing field during a game, for example a football in the game of American rules football, is disclosed. The apparatus includes a guide ramp having a length corresponding to the first down distance, having sighting lasers at each end and a spotting laser that moves along the guide ramp. At the beginning of a first down series, the guide ramp is moved to and anchored at a position at which one of the sighting lasers projects a mark corresponding to the position of the ball. If a play then occurs in which the ball is advanced to a location within the first down distance, the spotting laser is moved along the guide ramp until …
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 14, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 14, 2014.
- 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.