Encryption/decryption of program data but not psi data
CA 2862725 C · Owner: Zenith Electronics Corporation · Inventors: Turner, Rudolf; Hauge, Raymond C.; Lewis, Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An encrypted program received in an MPEG transport stream is decrypted by receiving a message in the MPEG transport stream wherein the message contains a key, decrypting the encrypted program based on the key and replacing the message in the MPEG transport stream with a packet.
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
- Filed May 18, 2006 and granted October 18, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 18, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.