Patents by Inventor Rajiv G. Wickremesinghe

Rajiv G. Wickremesinghe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • System and method for storing connectivity information in a web database
    Patent number: 7028039
    Abstract: A web crawler system includes a central processing unit for performing computations in accordance with stored procedures and a network interface for accessing remotely located computers via a network. A web crawler module downloads pages from remotely located servers via the network interface. A first link processing module obtains page link information from the downloaded page; the page link information includes for each downloaded page a row of page identifiers of other pages. A second link processing module encodes the rows of page identifies in a space efficient manner. It arranges the rows of page identifiers in a particular order. For each respective row it identifies a prior row, if any, that best matches the respective row in accordance with predefined row match criteria, determines a set of deletes representing page identifiers in the identified prior row not in the respective row, and determines a set of adds representing page identifiers in the respective row not in the identifier prior row.
    Type: Grant
    Filed: January 18, 2001
    Date of Patent: April 11, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Michael Burrows, Keith H. Randall, Raymond P. Stata, Rajiv G. Wickremesinghe
  • System and method for storing connectivity information in a web database
    Publication number: 20020138509
    Abstract: A web crawler system includes a central processing unit for performing computations in accordance with stored procedures and a network interface for accessing remotely located computers via a network. A web crawler module downloads pages from remotely located servers via the network interface. A first link processing module obtains page link information from the downloaded page; the page link information includes for each downloaded page a row of page identifiers of other pages. A second link processing module encodes the rows of page identifies in a space efficient manner. It arranges the rows of page identifiers in a particular order. For each respective row it identifies a prior row, if any, that best matches the respective row in accordance with predefined row match criteria, determines a set of deletes representing page identifiers in the identified prior row not in the respective row, and determines a set of adds representing page identifiers in the respective row not in the identifier prior row.
    Type: Application
    Filed: January 18, 2001
    Publication date: September 26, 2002
    Inventors: Michael Burrows, Keith H. Randall, Raymond P. Stata, Rajiv G. Wickremesinghe