Optically readable record carrier and playback system
CA 1070011 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Braat, Josephus J.M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A record carrier is described in which a television signal is stored in an optically readable information structure of trackwise arranged areas alternating with intermediate areas. The tracks exhibit an undulation. The luminance information is contained in the spatial frequency of the areas and the other information for example chrominance and sound information in the, variation of the undulation. The luminance information and the other information can be read independently by means of a suitable detector arrangement. - 33 -
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 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 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.