Improved communication switch
CA 2228263 C · Owner: Wierzbicki, Alex Lawrence · Inventors: Stanaway, John Joseph Jr.; Spanke, Ronald Anthony; Caniff, Ronald Jay
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An enhanced communication network switch utilizes a Time Slot Interchange facility to decompose and compose composite ATM cells that each comprise a 5 byte header and a 48 byte payload. The payload comprises data from a temporarily defined set of call connections of a virtual 48 channel transmission facility; and the switch comprises a Cell Header Decoder comprising a plurality of records which direct operation of the TSI to decompose corresponding received composite ATM cells. Atthe time that a cell is committed to call connection service the switch seizes and, initializes an idle record in the Cell Header Decoder. For the purpose of composing a composite ATM cell for transmission to an …
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 January 30, 1998 and granted November 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 30, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 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.