A subscriber line interface circuit
CA 2271109 A1 · Owner: Telefonaktiebolaget Lm Ericsson · Inventors: Eriksson, Hans; Larsson, Elisabeth
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a subscriber line interface circuit means are adapted to apply to a line , (1 2), associated with the line interface circuit an essentially constant , line current (IL) of a first predetermined value (IL1) for line voltages (UL) up to a first voltage (UL1) having an absolute value which by a predetermined , amount, is lower than the supply voltage (VBAT) of the line interface circuit. For line voltages (UL) between the first voltage (UL1) and a second voltage (UL2') having an absolute value which, by a predetermined amount is higher , than the first voltage (UL1) means are adapted to apply to the line a line , current (IL) which is inversely proportional to the line voltage (UL) and …
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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 November 6, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 6, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 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.