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Expired Canadian patentCanada

Apparatus and method for accessing data stored in a page mode memory

CA 1319201 C · Owner: International Business Machines Corporation · Inventors: Dean, Mark E.; Bland, Patrick M.

CIPO record

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

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Abstract From the Canadian patent

A computer system is provided in which memory access time is substantially reduced. After row address strobe (RAS) and column address strobe (CAS) signals are used to select a particular address in a memory during a first memory cycle, the addressed data is latched for later transfer to a data bus. A CAS precharge of the memory is then conducted after such latching and prior to the end of the first memory cycle before the commencement of the second memory cycle.

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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

  • Granted June 15, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 15, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 3, 1989
GrantedJune 15, 1993
Term endedJune 15, 2010
Patent numberCA 1319201 C
Classification (IPC)G06F12/00 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedMay 3, 1989Patent grantedJune 15, 1993Term endedJune 15, 2010

Sources & verification

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