Two pilot frequency control for communication systems
CA 1201777 A · Owner: Imt Communications Systems Inc · Inventors: Sewerinson, Ake N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Invention Two pilot signals, derived so that there is a predetermined ratio between the frequency difference of the tones and the absolute frequency of either of the pilot signals are transmitted from a refer-, ence station to each of a number of remote stations. At each receiving station, the frequency error is derived from the frequency difference of the two pilot signals, and this frequency error is used to adjust the frequency of the local oscillator. - 13 -
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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 March 11, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 11, 2003.
- 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.