Digital data transmission system having error detecting and correcting function
CA 2024344 C · Owner: Suzuki, Hideto · Inventors: Kurose, Yoshikazu; Suzuki, Hideto; Aoki, Shinji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides an information data recording and reproducing device which can record and reproduce input information data accurately. An error correction code of the product sign format is added to the input information data to form coded data. The coded data are then NRZI converted and recorded onto a record medium together with identification data of a predetermined data pattern. Error detecting and correcting processing is executed with reproduction data obtained from the record medium to reproduce the data recorded on the record medium. The device comprises an NRZI converting circuit for outputting the information data as they are without NRZI converting the same but for NRZI …
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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 30, 1990 and granted December 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 30, 2012.
- 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.