Frequency stabilizing device
CA 2123748 C · Owner: Ishii, Junichi · Inventors: Ishii, Junichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An intermediate frequency (IF) converter converts a received signal to an IF signal. A demodulator demodulates the IF signal to a demodulated signal and detects a phase error. A frequency error detector detects a frequency error based on the phase error. A modulated-carrier detector detects a modulated carrier component from the IF signal. When the modulated carrier component is detected, a controller achieves a frequency stabilizing operation based on the frequency error.
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 17, 1994 and granted October 13, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 17, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 17, 2016.
- 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.