A method and apparatus for authenticating documents including currency
CA 2215853 C · Owner: Mazur, Richard A. · Inventors: Stromme, Lars R.; Schreiter, Heinz W.; Graves, Bradford T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and device for authenticating documents comprising an ultraviolet light source illuminating a document to be tested; an ultraviolet light detector generating an output signal responsive to ultraviolet light reflected by the document; and a signal processor receiving the ultraviolet detector output signal and determining the authenticity of the document based upon said output signal.
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 March 8, 1995 and granted May 2, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 8, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 8, 2017.
- 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.