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Expired Canadian patentCanada

Method and apparatus for online definition of database descriptors

CA 1191616 A · Owner: International Business Machines Corporation · Inventors: Putzolu, Gianfranco R.; Traiger, Irving L.; Haderle, Donald J.

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Abstract From the Canadian patent

A computing system is characterized by a database management system which provides method and apparatus for online definition of data descriptors while maintaining the availability of data and data descriptors not impacted by a concurrent definitional process. Under the control of the database management system of the invention, the domain effected by the definitional process is determined, transactions which reference descriptors within the domain effected by the definitional process are marked for rebinding prior-to-, commit access by transactions which have not been prebound to objects within the domain effected by the definitional process is inhibited, and thereafter all accesses to …

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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 August 6, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 6, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 27, 1983
GrantedAugust 6, 1985
Term endedAugust 6, 2002
Patent numberCA 1191616 A
Classification (IPC)G06F9/30 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedApril 27, 1983Patent grantedAug 6, 1985Term endedAug 6, 2002

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