Digital telephony carrier current system
CA 2362960 A1 · Owner: Phonex Corporation · Inventors: Bullock, Scott R.; Knab, John M.; Bartholomew, David B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A distribution system for the distribution of digital telephony data streams for use in a building or facility which uses as a communication link, AC , power lines (105) is described. This distribution system communicates signals and data without the need for continuous telephone lines. This system provides a base unit (104) connected to a subscriber interface unit (102) which in , turn is connected to a public communication network. The base unit (104) further provides an AC power line interface (105) over which communication signals are communicated to extension units (106a 106b, ... 106e). The , extension units (106a 106b, ... 106e) support standard user telecommunication devices, …
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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 February 21, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 21, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 21, 2022.
- 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.