Electron gun for a color display apparatus
CA 1233868 A · Owner: Sony Corporation · Inventors: Murakami, Kanemitsu; Iguchi, Yukinobu; Kikuchi, Masahiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved electron gun beam for a three color gun which has a central cathode and side cathodes mounted on either side of the central cathode which produce beams for different colors which pass through first and second grids and a main electron lens and wherein the first and second grids are generally conically shaped so that they extend toward the central cathode and have further indentations in their central portion which extend toward the central cathode and wherein the thickness of the second grid at the center wherein the beam of the central cathode passes therethrough is less than at the portions of the second grid where the beams from the two side cathodes pass therethrough and …
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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 March 8, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 8, 2005.
- 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.