Patents by Inventor Mika Rautila

Mika Rautila 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).

  • Data packet filtering
    Patent number: 7386525
    Abstract: The invention relates to data packet filtering and finding a rule matching a data packet in a rule base. A data packet comprises parameter fields for identifying the data packet, the rule base comprises a plurality of rules, each rule comprises one or more parameter fields, and the matching rule is a rule, whose parameter field values correspond to the parameter field values of said data packet. The matching rule is found by determining rule sets for the data packet, one rule set comprising the rules to which one parameter field value of the data packet can match, and by finding the rule with the smallest label that is present in all said rule sets of the data packet, said rule with the smallest label indicating the rule matching the data packet. Additionally, the invention relates to finding an element with the smallest label that is present in a plurality of finite subsets containing finite number of elements, said subsets being subsets of a set containing finite number of sequentially labelled elements.
    Type: Grant
    Filed: September 21, 2001
    Date of Patent: June 10, 2008
    Assignee: Stonesoft Corporation
    Inventors: Kari Nurmela, Mika Rautila
  • Data packet filtering
    Publication number: 20030120622
    Abstract: The invention relates to data packet filtering and finding a rule matching a data packet in a rule base. A data packet comprises parameter fields for identifying the data packet, the rule base comprises a plurality of rules, each rule comprises one or more parameter fields, and the matching rule is a rule, whose parameter field values correspond to the parameter field values of said data packet. The matching rule is found by determining rule sets for the data packet, one rule set comprising the rules to which one parameter field value of the data packet can match, and by finding the rule with the smallest label that is present in all said rule sets of the data packet, said rule with the smallest label indicating the rule matching the data packet. Additionally, the invention relates to finding an element with the smallest label that is present in a plurality of finite subsets containing finite number of elements, said subsets being subsets of a set containing finite number of sequentially labelled elements.
    Type: Application
    Filed: September 21, 2001
    Publication date: June 26, 2003
    Inventors: Kari Nurmela, Mika Rautila