Device for transmitting information by means of acoustic signals
CA 2316178 A1 · Owner: Kudnig, Knud · Inventors: Kudnig, Knud; Kuschel, Dietmar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a device for generating acoustic signals a mechanical profile which , contains information in a coded form is arranged on the surface of a plastic card, can be led over an edge for generating sounds which contain the information, and has at least two adjacent tracks. The plastic card can be inserted into a guiding part, for example a card slide provided with at least , one scanning cam of which one edge rattles on the profile when the profile is drawn past it.
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 December 22, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 22, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2020.
- 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.