Method for producing and checking forge-proof documents
CA 2425184 A1 · Owner: Lang, Jurgen · Inventors: Meyer, Bernd; Lang, Jurgen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for producing forge-proof documents using a security module which generates a temporary secret which is unknown to the document producer. The temporary secret in conjunction with information , revealed about the identity of the security module is transferred in , encrypted form to an authentication unit. Said authentication unit recognizes the identity of the security module and decodes the temporary secret together with other information which is encoded in such a way that only one checking station can implement decoding. The authentication unit transfers data to the document producer who transfers producer data which is integrated into the , …
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 October 5, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 5, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 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.