System and method for enforcing politeness while scheduling downloads in a web crawler
US6735585B1
Method for search engine generating supplemented search not included in conventional search result identifying entity data related to portion of located web page
US6321220B1
Method and apparatus for preventing topic drift in queries in hyperlinked environments
US6138113A
Method for identifying near duplicate pages in a hyperlinked database
US6112203A
Method for ranking documents in a hyperlinked environment using connectivity and selective content analysis
