Enhanced telecommunications switching unit
CA 2233341 C · Owner: Chrin, Christopher James · Inventors: Zola, Meyer Joseph; Chrin, Christopher James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An enhanced form of time switch. Serial bit streams received in input buffers are stored in parallel under program control in the cache of a pipe lined microprocessor. The microprocessor, under program control then rearranges the received time slots and feeds them in parallel to output buffers from which serial bit streams are generated. Advantageously, program control is used to flexibly control the various functions of different time switches without requiring a change in the hardware.
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 30, 1998 and granted September 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 30, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 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.