Cathode ray tube having shadow mask with variable aperture spacing and mask-screen spacing
CA 1069165 A · Owner: Rca Corporation · Inventors: Morrell, Albert M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A cathode-ray tube of the vertical line screen slit apertured mask type includes a mask wherein the horizontal center-to-center spacing between adjacent apertures in the mask, and the spacing between the mask and screen, vary proportionally from the center to the edge of the mask.
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 January 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 1, 1997.
- 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.