Vacuum cleaner having a plurality of power modes
CA 2420497 C · Owner: Conrad, Wayne Ernest · Inventors: Conrad, Wayne Ernest
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vacuum cleaner has a plurality of operating modes is provided. The vacuum cleaner includes a power control system having at least one sensor for automatically sensing a change in the operating mode of the vacuum cleaner and for generating a mode signal. A microprocessor responsive to the mode signal is adapted to vary the power supply signal being supplied to the vacuum cleaner motor and fan assembly.
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 April 20, 2000 and granted June 28, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 20, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 20, 2022.
- 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.