Patent Yard Sign in
Expired Canadian patentCanada

A configuration method for a data management system

CA 2197199 C · Owner: British Telecommunications Public Limited Company · Inventors: Quintela, Maria Paula; Wilby, Mark

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

Data elements stored in a distributed data structure are accessible by means of a hierarchical routing network in which routes through the network to individual data elements are flagged. The network comprises communicating links between nodes (1, 2, 3), extending from a "root node" (2) to a plurality of end nodes (3). The end nodes (3) contain the data elements. To find a data element, a search message entering the network at an end node (3) passes through the network towards the root node (2) until it encounters a flagged route to the relevant data element. Thereafter it passes along the route to the end node (3) containing the relevant data element. The invention is relevant to …

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

  • Filed August 9, 1995 and granted October 3, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 9, 2015.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 9, 2017.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 9, 1995
GrantedOctober 3, 2000
Term endedAugust 9, 2015
Patent numberCA 2197199 C
Classification (IPC)H04Q3/00

Timeline

Timeline From CIPO dates

1996199820002002200420062008201020122014Application filedAug 9, 1995Patent grantedOct 3, 2000Term endedAug 9, 2015

Sources & verification

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