Optical reading head
CA 1099408 A · Owner: De Staat Der Nederlanden, Te Dezen Vertegenwoordigd Door De Directeur-Ge Neraal Der Posterijen, Telegrafie En Telefonie · Inventors: Van Wijngaarden, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an optical reading head particularly for reading luminescent code bars on documents and the like, which reading head is provided with a source of light for irradiating the bars and with a detector for collecting the rays, emitted by the bars, by means of an optical guide which, is hollow, and at least the end near the point where the rays are collected is made of a filter material transmitting ultraviolet radiation.
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 April 14, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 1998.
- 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.