Fault insertion
CA 2087448 C · Owner: Northern Telecom Limited · Inventors: Hum, Robert Andreas; Hjartarson, Gudmundur Albert; Wilcox, Philip Stanley
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An integrated circuit 11 12, 13, 14) having boundary-scan facilities in accordance with IEEE Standard 1149.1 has its boun-, dary scan chain configured to permit fault insertion testing of diagnostic and maintenance software. Each scan cell (39 40, 45, 46), includes storage devices for storing a pair of bits of a binary vector shifted into the boundary scan chain. One bit comprises faulty data and the other bit serves to control application of the faulty data by the scan cell. A system incorporating such integrated circuits includes a controller (23) for controlling the IEEE test interface to shift the binary vector into the boundary scan chain and, diagnostic and maintenance software (21) …
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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 August 19, 1991 and granted May 6, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 19, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 19, 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.