Automatic detector and selector of rs-232 or v.35 interface
CA 2113075 C · Owner: Fournier Assets Limited Liability Company · Inventors: Vellucci, Eugene, Jr.; Evans, Patrick A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An automatic detection and selection circuit (10) resident in a DCE is provided. The circuit (10) is coupled to the DCE interface connector and detects receipt by the DCE of V.35 and RS-232 transmit data signals, distinguishes between those signals and selects circuitry for passing the data therethrough. The circuit comprises a switch (20) coupled to a first TX data terminal (pin 2 or P) of the DCE interface connector first and second line receiving , circuits (30 50), a microprocessor (75), and relay (82). The first line receiving circuit (30) is coupled to a first pole of the switch (20) and to the second TX data terminal (pin S) of the DCE interface connector and provides indications …
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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 July 9, 1992 and granted September 24, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 9, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 9, 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.