Method for discriminating authenticity of a bill and an apparatus therefor
CA 1307036 C · Owner: Yoshihara, Kenzou · Inventors: Yoshihara, Kenzou
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for discriminating the authenticity of a bill put into an automatic vending machine etc. on the basis of a degree of brilliance of a surface of the bill, comprises two photodiodes for receiving light irradiated from a light-emitting diode and reflected by the bill, and a polaroid filter disposed in front of one of the photodiodes. A differential amplifier or a divider is supplied with output currents from the photodiodes, respectively representing an amount of the reflected light received not through the polaroid filter and containing a polarized component which is produced when the light is reflected on the surface of the bill, and an amount of the reflected light received …
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
- Granted September 1, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 1, 2009.
- 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.