Secure communication system
CA 1293785 C · Owner: Wilson, Alan L. · Inventors: Hennen, Harry Anthony; Wilson, Alan L.; Bray, Michelle M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, Disclosed is a synchronous secure communication system (Figure 1) wherein an information signal is encrypted in an encryption means (208). The encrypted signal is compressed (210) to allow the insertion of a pseudo-random synchronization signal (212) and the, combined signals are transmitted (220). At the receiver the pseudo-random synchronization signal is extracted (232) and used to synchronize the receiver to the incoming data stream thereby improving receiver sensitivity and range.
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 December 31, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 31, 2008.
- 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.