Transmission type projection screen
CA 1285161 C · Owner: Sekiguchi, Hiroshi · Inventors: Sekiguchi, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A screen formed with a plurality of lenticular lenses on both the surfaces is provided. There are formed on the incident surface a plurality of sets of incident side main lenticular lenses and incident side auxiliary lenticular lenses, each set being arranged on both the sides of the main lenticular lens. Further there are formed on the emission surface a plurality of emission side main lenticular lenses and a plurality of pairs of emission side auxiliary lenticular lenses each, pair being arranged on both the sides of the main lenticular lens. The greater part of an incident light is incident from the incident side main lenticular lens and is emitted from the emission side main lenticular …
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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 June 25, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 25, 2008.
- 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.