Microprocessor watchdog system
CA 1160753 A · Owner: Canadian General Electric Company Limited · Inventors: Muller, Karl O.; Boothman, David R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Case 2715, MICROPROCESSOR WATCHDOG SYSTEM ABSTRACT OF THE DISCLOSURE, A watchdog system for a microprocessor uses the primary AC power source to initiate restart signals for the microprocessor. The microprocessor has an internal checking system which checks one or more memory locations for specific numbers or codes which are present in normal operation. Other additional checks may be made. If the check is satisfactory the, microprocessor provides a reset signal at regular intervals. A counter is coupled to the primary AC power source and it counts the pulses it receives until a predetermined count is reached. The counter then provides a restart signal. The counter is reset by the reset …
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 January 17, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 17, 2001.
- 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.