Security access control system enabling transfer of authorisation to make keys
CA 2252002 A1 · Owner: La Poste · Inventors: Girault, Marc; Guerin, Didier; Hardy, Constant
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An access control system rendered secure by means of a portable storage medium (C) on which is registered an electronic key (CL) comprises electronic key production means (LE) and means ensuring an electronic locking function (L) to authorise access when the storage medium comprises the required electronic key. According to the invention to transfer the authorisation to make (CL) keys from one production means (LE) to another a new public key (K') and signature (CER') of this key are loaded into it. The invention is useful in the management of buildings.
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 April 15, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 15, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 2019.
- 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.