Signal processing circuit for the european digital cellular radiotelephone system
CA 2055576 C · Owner: Alcatel N.V. · Inventors: Rousseau, Emmanuel; Dartois, Luc
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a signal processing circuit for the European digital cellular telephone system exchanging word samples continuously with a conversion circuit exchanging digital signals on the base band with a radio circuit and exchanging data and signalling information with a control circuit which also sends control signals to it. The said circuit comprises a control operator a processor which controls an audio operator and a radio operator a control operator, the audio operator receiving and producing word samples and sending them to the processor, receiving them from the said processor in the form of sample groups the radio operator receiving and producing digital signals on the …
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 November 14, 1991 and granted April 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 14, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 14, 2013.
- 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.