Sound system and method of sound reproduction
CA 2827686 C · Owner: Thx Ltd. · Inventors: Fincham, Lawrence R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A narrow profile sound system comprises a drive unit disposed on a mounting surface. The mounting surface forms a barrier acoustically isolating the drive unit's forward radiation from its rearward radiation. The narrow profile sound system also includes a sound reflecting surface facing the drive unit and a narrow sound duct terminating in an elongate output slot. The sound duct is defined by the sound reflecting surface. The mounting surface and an interior sidewall disposed between the sound reflecting surface and the mounting surface follows a rear contoured edge of the drive unit opposite the sound duct such that the sound duct provides a substantially straight path from the drive unit …
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 8, 2002 and granted April 28, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 8, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 8, 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.