Speaker system with an anion generator and television using the speaker system
CA 2115127 C · Owner: Goldstar Co. Ltd. · Inventors: Hwang, Kyong Soo; Kim, Chan Han; Lee, Deog Jin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A speaker system with an anion generator and a television set using the speaker system. The speaker system includes an anion generator provided within a speaker box. Sound pressure is used to help spread the generated anions outside the speaker box. An antistatic agent may optionally be provided on one or more surfaces of the speaker box to prevent static charge build-up within the speaker box.
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 February 7, 1994 and granted July 21, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 7, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 7, 2016.
- 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.