A method for transmitting digital data and digital complementary data, and a method for playing back digital data and digital complementary data
CA 2192958 C · Owner: Lauterbach, Thomas · Inventors: Unbehaun, Matthias; Lauterbach, Thomas; Hallier, Jurgen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is disclosed for transmitting and playing back digital data and digital complementary data during a digital radio broadcast. Audio data are transmitted as well as complementary data that may be selected to be broadcast together with the audio data. The complementary data may for example be images texts and/or speech provided with control characters for broadcasting the complementary data at predetermined moments in time.
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 June 10, 1995 and granted November 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 10, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 10, 2017.
- 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.