Method and system for selling data
CA 2317141 A1 · Owner: Hitachi, Ltd. · Inventors: Matsuzawa, Shigeru; Kodama, Kazuyuki; Kondo, Kaori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Desired data is retrieved. A part of the data which contains a buried electronic watermark is extracted from the retrieved data and output. A section of data where the electronic watermark is buried is detected from the data. A charge unit corresponding to the detected electronic watermark information is retrieved from a customer management database, and a charge for use of the picture information is calculated.
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 August 30, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 30, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 30, 2022.
- 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.