Modular, user programmable telecommunications system with distributed processing
CA 2113575 C · Owner: Digital Technics, Inc. · Inventors: Bolon, Brian; Vaziri, Faramarz; Emerick, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A telecommunications system (10) is provided to conned a plurality of dissimilar types of subscriber telecommunications devices and to provide integrated telecommunications services. The system is provided with a digital communications link (55) comprising a PCM bus for voice and data and an HDLC coded PCM highway for control signals to create a master/slave environment, wherein a central processing board (56) operates as a master processor for a plurality of peripheral processor boards (54). The peripheral boards are coupled to various subscriber telecommunications devices. The CPU board is provided with hierarchical program control that includes low level program code for driving CPU …
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 July 15, 1992 and granted July 1, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 15, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 15, 2014.
- 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.