Horn for sportfans
CA 2122045 A1 · Owner: Gyorgy, Laszlo · Inventors: Gyorgy, Laszlo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The horn according to the invention is provided with a pressure tube, a membrane and a sound tube, wherein both the pressure tube and the sound tube are in connection with said membrane. The horn is characterized in that the membrane is streched out on the front face of the pressure tube, the sound tube is arranged within and coaxial with the pressure tube and its front face rests flat against the central part of the membrane an annular air gap is, arranged between the outer surface of the sound tube and the inner surface of the pressure tube, said gap being closed at the end opposite to the membrane and there is a sound hole in the wall of the pressure tube.
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 October 30, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 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.