Multiprocessor system for conducting initial processing for shared circuit
CA 2074628 C · Owner: Kondou, Seiji · Inventors: Kondou, Seiji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multi-processor circuit having a plurality of microprocessors coupled to a shared circuit includes an OR Gate for receiving read signals from each of the microprocessors, and a D-type flip flop which toggles an initial processing permission signal between a permission state and an inhibit state. When power is initially supplied to the circuit, or upon receipt of a reset signal the initial processing permission signal is set by the D-type flip flop to the permission state. In this condition the first microprocessor to recognise, the permission state of the initial processing permission signal issues a "read" signal and performs an initial processing operation. In response to the "read" …
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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 24, 1992 and granted March 2, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 24, 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
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.