Duplicate document detection and presentation functions
CA 2578157 C · Owner: West Services, Inc. · Inventors: Claussen, Joanne R. S.; Conrad, Jack G.; Lin, Jie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Many companies provide online search facilities that enable users to conduct computerized searches for documents. Unfortunately these searches frequently , provide results that include duplicate documents---that is documents that are , completely or substantially identical to each other. This problem is particularly vexing when searching news stories for example. Moreover, the , duplicate documents are intermixed in the search results leaving users to , manually manage the complexities of identifying and/or filtering them. Accordingly, the present inventors devised systems methods, and software that , facilitate the identification and/or grouping of duplicate documents in search …
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 23, 2005 and granted July 5, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 23, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.