Sound masking system
CA 2398201 A1 · Owner: Punia, David · Inventors: Punia, David; Roy, Kenneth P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a sound masking system including an airflow unit housing at least one speaker generating a masking sound field. The airflow unit is often an air diffuser, set into a conventional suspended ceiling comprised of ceiling tiles. The air diffuser, provides an acoustic hole in the ceiling plane whereby sound can travel into the room, unencumbered by the plane of ceiling tiles. The speaker is housed within the air, diffuser and is directed into the room to be treated. The speaker is capable of, producing sound waves in a frequency that masks the human voice.
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 August 20, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 20, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 20, 2024.
- 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.