Testing a communications network for duplicate station addresses
CA 2047321 C · Owner: Koning, G. Paul · Inventors: Koning, G. Paul; Hutchison, Jerry; Yang, Henry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus to detect stations having duplicate addresses, the stations being of the type connected in a computer communications network uses a neighbor response test and a transmit self test using time out; a neighbor response test for setting a neighbor indicator to timeout in the event that a timeout occurs, and for setting the neighbor indicator to pass in the event that a received response frame indicates no destination address match, and for setting the neighbor indicator to fail in the event that a received response frame indicates that a destination address match occurred; a duplicate address indicator responsive to the neighbor response test and the transmit self test sets the …
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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 18, 1991 and granted November 18, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 18, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 18, 2013.
- 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.