Optical scanner lens system
CA 1296207 C · Owner: Plummer, William T. · Inventors: Clark, Peter P.; Plummer, William T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical element that is particularly suitable for use in the optical system of a hand-held probe to conduct light to and from bar codes as they are scanned or read for information. The element preferably is integrally formed as a single piece fabricated of optical plastic by injection molding and includes three surfaces, one of which in preferred form is decentered with respect to the element optical axis and forms with another surface an opposed pair used to control the output of a source to illuminate bar codes. The remaining surface, the third, is prismatic, either converging or diverging as required, and is structured to cooperate with part of one of the paired opposed surfaces to …
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 February 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 25, 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.