Network architecture for providing two-way broadband communications
CA 2257764 C · Owner: At&T Corp. · Inventors: Lu, Xiaolin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention comprises a method and apparatus for delivering bi-directional broadband communications over an existing network. The present invention is particularly applicable in any existing network whereby multiple primary remote nodes (PRNs) are allocated along a communication path which partition the communication path into multiple segments. Typically the overall system bandwidth is defined/limited by the bandwidth of those PRNs but the communication path itself has a much larger bandwidth. Through the introduction of secondary remote nodes (SRNs) the present invention provides a cost effective mechanism for providing bi-directional broadband communications in any …
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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 7, 1999 and granted October 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 7, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 7, 2021.
- 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.