Data conversion apparatus and method in copyright protecting system
CA 2316877 C · Owner: Tagawa, Kenji · Inventors: Maeda, Tetsuo; Minami, Masataka; Tagawa, Kenji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a data conversion apparatus (101) of a copyright protecting system a data , format judging portion (103) judges whether or not the data is of a super distribution format, attribute information obtaining unit (105) identifies the audio contents of the data and obtains the attribute information corresponding to the identified audio contents from the external equipment via said data transmission/receiving portion (102); and a data format conversion portion (104, 105, 106) converts the audio contents together with the obtained attribute information to the super distribution data format to be supplied to an external recording apparatus (121).
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 November 8, 1999 and granted October 8, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 8, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 2021.
- 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.