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Expired Canadian patentCanada

Reference addressing method and system for a personal computer

CA 2012402 C · Owner: International Business Machines Corporation · Inventors: Beitel, Bradley James; Sobrino, Elba Maria; Haug, Charles Leslie

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

A computer/software system is described which enables a user to produce and display an audio/visual application using a library of image, audio and story objects. The system creates a first library data file which includes a list of application files. It then creates a bill of materials listing for each application file, each listing comprising a first field area for an object name and a second field area for a path definition to where said object is listed in another application bill of materials and physically exists. The system then runs the application and accesses all objects listed therein, any object With a path listing being accessed from the file indicated by the path definition. A …

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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 16, 1990 and granted April 26, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 16, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 16, 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.
FiledMarch 16, 1990
GrantedApril 26, 1994
Term endedMarch 16, 2010
Patent numberCA 2012402 C
Classification (IPC)G06F7/20 +1 more

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedMarch 16, 1990Patent grantedApril 26, 1994Term endedMarch 16, 2010

Sources & verification

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