Currency evaluation and discrimination
CA 2379146 C · Owner: Schreiter, Heinz W. · Inventors: Raterman, Donald E.; Bauch, Aaron M.; Mazur, Richard A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for discriminating between currency bills of different denominations which comprises the steps of illuminating a predetermined section of a currency bill by focusing at least one strip of light thereupon detecting light reflected off the illuminated section of the bill to generate an analog reflectance signal and generating relative lateral displacement between the strip of light and the bill so as to illuminate and optically scan successive sections of the bill along a predetermined dimension thereof. A series of analog reflectance signals are obtained corresponding to light reflected from each of the successive bill sections; the reflectance signals being taken at intervals …
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 13, 2003. 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.