Filter arrangement
CA 2316336 A1 · Owner: Ericsson Austria Aktiengesellschaft · Inventors: Pfeiffer, Johann; Listopad, Manfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a filter arrangement for separating analog or digital baseband signals for example, POTS or ISDN signals and digital wideband signals which , are simultaneously transmitted on a two-wire line of a message transmission system. The filter arrangement has a bi-directional low-pass filter and a bi-directional high--pass filter, whereby the low-pass filter comprised of at least one first filter with a first passband said filter , permitting flow-through of direct current and at least one , second filter with a second passband is preferably assembled by connecting the inputs and outputs of the first and second filters in series.
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 16, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 16, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 16, 2020.
- 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.