Image distortion for content security
CA 2581366 C · Owner: Google Inc. · Inventors: O'Sullivan, Joseph K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A software module is presented that enables a person to determine the relevance of an electronic document while preventing the person from making a complete copy of the document. In one embodiment this is accomplished by , displaying an image that represents a region of interest and conveys the context of the region of interest within the document while distorting other portions of the document. In one embodiment the software module is used in , conjunction with a search engine to generate an image of a search result document.
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 September 21, 2005 and granted December 31, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 21, 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.