Colour display tube with divided-aperture colour selection electrode
CA 1101916 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Van Der Ven, Robert F.L.M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PHN 8753, 23-8-77, ABSTRACT:, By using colour selection means in a colour display tube which are composed of a metal plate having a large number of apertures, against which plate elongate conductors are provided so as to be electrically insulated from the plate in such manner that the conductors bridge the apertures and divide them into two substantially symmetrical halves post-, focussing is possible. It is also possible to operate such a colour display tube according to the chromatron principle. -12-
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 May 26, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 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.