Two-way communication system for tracking locations and statuses of wheeled vehicles
CA 2896121 C · Owner: Gatekeeper Systems, Inc. · Inventors: Carter, Scott J.; James, Jesse M.; Hannah, Stephen E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for controlling shopping cart usage in the vicinity of a parking lot. The system includes a device that repeatedly transmits a lock command from a directional antenna the directional antenna mounted above ground and angled downward to create a lock zone in which shopping cart use is restricted the lock zone encompassing an exit area associated with the parking lot and a plurality of shopping carts each shopping cart comprising a brake mechanism and comprising a radio frequency (RF) communication circuit that is responsive to the lock command by activating the brake mechanism.
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 March 20, 2006 and granted August 30, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 20, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.