Information management system
CA 2502745 A1 · Owner: Yamamoto, Masaya · Inventors: Yamamoto, Masaya; Inoue, Mitsuhiro; Nakahara, Tohru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A group management server (20) of a group information management system (1) includes a group belonging terminal list storage section (25) for storing a group belonging terminal list (251) and a secure communication section (21) for forming a secure communication path to/from a plurality of terminal devices (60) and communicating with each of the terminal devices (60) via the communication path. Each of the terminal devices (60) has a tamper-resistant module (68). The tamper-resistant module (68) includes: a group information storage section (65) for securely storing the group information; a deletion section (67) for securely deleting the group information stored in the group …
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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 December 17, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 17, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 2025.
- 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.