Electron gun for a cathode ray tube
CA 1111966 A · Owner: Sony Corporation · Inventors: Tsukamura, Yoshihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electron gun used in a cathode ray tube for example, color television picture tube is disclosed. The electron gun, has a plurality of electrodes aligned in one direction along an axis of a neck portion of the cathode ray tube. Each of the electrodes is supplied with a suitable potential for focusing and accelerating an electron beam derived by a cathode. A resistance element which comprises a ceramic substrate coated with a layer of resistive material is provided along and adjacent to the electrodes in the cathode ray tube. One end of the resistance element is electrically connected to the anode potential, and another end is connected to a stem lead pin which is at a substantially low …
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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 November 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 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.