Apparatus for transmission path delay measurements using adap tive demodulation
CA 2133223 C · Owner: Christian, Paul R. · Inventors: Karczewski, Casimier; Christian, Paul R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A simulcast transmission system (100) utilizes adaptive demodulation to provide an apparatus for automatic delay equalization measurements. The simulcast transmission system (100) comprises a control station (101), and a plurality of remote stations (201 301), capable of re-transmitting a received delay equalization measurement signal which includes at least a correction bit pattern signal followed by a synchronization pattern signal. A receiver (151, 191) receives the re-transmitted delay equalization measurement signal, correlates the received signal to obtain a coarse time of reception and, analyzes the received correction bit pattern signal to derive a fine reception time correction …
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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 January 18, 1994 and granted September 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 18, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 18, 2016.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.