Symbol lock detector
CA 2274718 A1 · Owner: Gte Government Systems Corporation · Inventors: Westfall, Dan L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A simplified symbol lock detector which uses T/2-spaced signal samples in conjunction with an interpolator (12, 14 16, 18, 20, 22) to approximate the , T/4-shifted signal samples used by conventional symbol lock detectors. The approximated T/4-shifted signal samples are processed by a phase detector (24 26) prior to input to a threshold detector (28) which indicates proper symbol lock if the lock signal exceeds a predetermined threshold.
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 December 24, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 24, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 24, 2019.
- 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.