Program patching of a rom
CA 2068705 C · Owner: Sony Corporation · Inventors: Furui, Sunao; Matsuno, Katsumi; Shimada, Keiichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A micro-controller integrated on a single substrate and which includes a read-only information memory for storing firmware, an address controller for performing address control, and an input port for inputting information supplied thereto from a source external to the substrate further incorporates a correcting information storage memory for receiving correcting information input thereto from the source external to the substrate through the input port and storing the correcting information upon an initialization of the micro-controller wherein the, correcting information is indicative of a modification for a defective information part stored in the read-only information storage memory and …
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
- Filed May 14, 1992 and granted October 22, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 14, 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.