Serial testing of removable circuit boards on a backplane bus
CA 2104685 C · Owner: Ast Research, Inc. · Inventors: Kennedy, Barry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for controlling daisy-chain testing of removable printed circuit boards (156 158) installed along a backplane bus, (152) facilitates the use of serial testing methods for circuit boards which are designed according to boundary-scan testing standards. The system automatically controls propagation of serial test data from a serial data pattern generator (154) to a removable circuit board (156) and then from circuit board to circuit board as installed consecutively along the backplane bus (152) and from, the last circuit board installed on the bus (152) to a pattern comparator (154) which determines whether the pattern matches an expected pattern to isolate components on the circuit …
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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 March 4, 1992 and granted August 11, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 4, 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
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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.