US Patent 7660787 Customized, personalized, integrated client-side search indexing of the web

A client-side search indexing program works transparently and in conjunction with a server based search index. The combined search indexes provide a more accurate and up-to-date image of the Web, customized to the interests of each individual user. The client-side indexer customizes indexing of particular Web pages to the preferences and usage patterns of the user. The user initially installs and configures the client-side indexer on the client. The requested indexes are automatically refreshed and integrated with the main server-side indexes during a search. When the user performs a search, the client-side indexes may be combined with the main server-side index. The combined indexes provide accurate search results for the particular user.