Gravity gradiometer
CA 2006145 C · Owner: University Of Western Australia (The) · Inventors: Van Kann, Frank Joachim; Buckingham, Michael Joslin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A queuing system is provided for gaming apparatus such as a billiards table. The system uses a remote consol that is coin operated and has a keypad for players to enter, their names in a sequence of players. The consol dispenses a ticket with a unique identifier, marked on the ticket corresponding to the player name. A display associated with the, apparatus, for example above a billiards table displays the name or names of , the persons playing. When a game is completed, as by pocketing the black ball in a game of snooker, the apparatus detects this condition and signals the main processor through an infra red link, that the game is over. The apparatus is then locked up as by locking a …
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 December 20, 1989 and granted February 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 20, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2011.
- 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.