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Google has clinched two significant patents this week. The first patent is related to methods for estimating similarity between web pages and documents.

This patent would prove highly reliable to filter duplicate contents in the Web. The patent 'Methods and apparatus for estimating similarity.' has been invented by Moses Samson Charikar. Google has applied for it on December 31,2001.

The second patent is Digital mapping system. This patent would provide a framework for digital mapping system including searches for locations, local searches and driving directions. The digital mapping patent will further glorify Google Maps services. The inventors of digital mapping system are Bret Steven Taylor, Jens Eilstrup Ramussen, Lars Eilstrup, James Christopher Norris, Seth Michael Laforge, Noel Phillip Gordon, Andrew Robert Kirmse and Stephen Ma. Google has filed for the patent on February 5, 2005.

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