Expired Canadian patentCanada
Frequency control apparatus and method for a digital radio receiver
CA 2009468 C · Owner: Motorola, Inc. · Inventors: Borth, David E.; Kepler, James F.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Invention A frequency control apparatus and method is disclosed in which a frequency offset between a received signal and the local oscillator (115) of a digital receiver is corrected in substantially one step.
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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
- Filed February 7, 1990 and granted February 1, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 7, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 7, 1990
GrantedFebruary 1, 1994
Term endedFebruary 7, 2010
Patent numberCA 2009468 C
Classification (IPC)H04B1/16 +2 more
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.