Verifying circuit operation
CA 1109160 A · Owner: International Business Machines Corporation · Inventors: Marshall, John W.; Woodward, Donald R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polynomial based apparatus such as an error, correcting apparatus is checked by repeatedly supplying, test bits to the apparatus. On even cycles the modulo, two sum of the signal contents should be zero while, on odd cycles it should be equal to the pattern used for test purposes.
Read the whole patent
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
- Granted September 15, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 15, 1998.
- 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.