Atm networks for narrow band communications
CA 2178917 C · Owner: Stanaway, John Joseph, Jr. · Inventors: Hiller, Thomas Lloyd; Wierzbicki, Alex Lawrence; Zola, Meyer Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pulse Code Modulations (PCM) signal streams are converted into Asynchronous Transfer Mode (ATM) cells for switching and transmissions across a telecommunications network. Each cell carries one PCM sample of up to 48 different voice connections the voice, connections being selected from the PCM data streams because they have a common destination. The cells are transmitted over ATM virtual paths, each path transmitting one cell every 125 µs. The ATM signals are switched by units for switching cells (cell switching) while keeping their payload contents intact and by units for switching the signals for individual voice connections between cells of an ATM signal (cell remapping). Advantageously …
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 March 1, 1994 and granted March 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 1, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 1, 2016.
- 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.