Vacuum cleaner
CA 2074579 C · Owner: Daewoo Electronics Corporation · Inventors: Lim, Moo-Seang; Son, Chang-Woo; Kang, Sang-Bo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vacuum cleaner with the noise greatly reduced is disclosed. The vacuum cleaner includes a blower assembly which comprises: a vibration absorbing means for absorbing the vibrations occurring due to the high speed revolutions of electric blower 1; a noise shielding means for shielding the noise so as for the noise from the electric blower not to be propagated to the outside; a flow path changing means for curving and extending the flow path by banding the flow path of the air after passing through the electric blower; and a noise absorbing means for suppressing the noise by absorbing the noise propagated through the flow path. The vacuum cleaner of the present invention further includes …
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 July 23, 1992 and granted January 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 23, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 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.