Microprocessor system having an extended address space
CA 2012318 C · Owner: Shimasue, Tsutomu · Inventors: Ishibashi, Masaaki; Shimasue, Tsutomu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a microprocessor system for extending an address space. To effectively use a program in the original address space and to reduce the processing time to return from the extended address space to the original address space, the system comprises a basic memory (1) having a first address space (7) for storing at least one program and a second address space (8)for storing data; an extended memory (2) having an extended address space used in place of a part (3) of the first address space, for storing at least one additional program; an address extending hard register (4) for storing a flag (5) and extending addresses (6) of the extended memory, the flag indicating which part of the …
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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 15, 1990 and granted July 30, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 15, 2012.
- 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.