Patent Yard Sign in
Expired Canadian patentCanada

Cache-memory management unit system

CA 1283219 C · Owner: Hollingsworth, Walter H. · Inventors: Hollingsworth, Walter H.; Sachs, Howard Gene; Cho, James Youngsae

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

A cache and memory management system architecture and associated protocol is disclosed. The cache and memory management system is comprised of a set associative memory cache subsystem, a set associative translation logic memory subsystem, hardwired page translation, selectable access mode logic and, selectively enablable instruction prefetch logic. The cache and memory management system includes a system interface for coupling to a systems bus to which a main memory is coupled, and is also comprised of a processor/cache bus interface for coupling to an external CPU. As disclosed, the cache memory management system can function as either an instruction cache with instruction prefetch …

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 April 16, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 16, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 21, 1986
GrantedApril 16, 1991
Term endedApril 16, 2008
Patent numberCA 1283219 C
Classification (IPC)G06F12/08 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedFeb 21, 1986Patent grantedApril 16, 1991Term endedApril 16, 2008

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.