User adjustable volume control that accommodates hearing
CA 2328353 A1 · Owner: Saunders, William R. · Inventors: Saunders, William R.; Vaudrey, Michael A.; Blum, Ronald D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is a method for mixing audio signals based on the preference from hearing impaired listeners as well as non-hearing impaired , listeners without forcing hearing impaired individuals to employ special hearing-impaired equipment. A user activated controller (10 11) controls a , mixture of a preferred audio signal and a remaining audio signal across a range sufficiently wide enough to encompass all individuals. The preferred audio is recorded and maintained separated from all remaining audio and delivered to the listener in a manner that maintains this separation. The controller (10, 11) enables the user to specify a range about the ratio in which the audio may …
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 14, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 14, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 14, 2021.
- 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.