Electronic bordering system
CA 2303923 A1 · Owner: Bergvall, Bengt Allan · Inventors: Petersson, Ulf; Bergvall, Bengt Allan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electronic bordering system (1) for a working tool (2) in which a border , cable (3), i.e. an electric cable is placed above, under or on ground or floor, so that it separates an inner area (4) within the border cable (3) from an outer area (5). The working tool is preferably intended for attendance of ground or floor, such as grass-cutting vacuum-cleaning, etc. A signal , generator (6) feeds the border cable with current whose magnetic field (7) , affects at least one sensing unit (8) located on the working tool so that the , sensing unit emits signals (9) to a control unit (10) which in cooperation , with an engine control (11) or a signal system for a driver, and at least one …
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 September 15, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 15, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 15, 2020.
- 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.