Patents by Inventor Risto Siilasmaa

Risto Siilasmaa 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).

  • Computer virus screening
    Patent number: 6577920
    Abstract: A method of screening a software file for viral infection comprising defining a first database of known macro virus signatures, a second database of known and certified commercial macro signatures, and a third database of known and certified local macro signatures. The file is scanned to determine whether or not the file contains a macro. If the file contains a macro, a signature for the macro is determined and screened against the signatures contained in said databases. A user is alerted in the event that the macro has a signature corresponding to a signature contained in said first database and/or in the event that the macro has a signature which does not correspond to a signature contained in either of the second and third databases.
    Type: Grant
    Filed: October 2, 1998
    Date of Patent: June 10, 2003
    Assignee: Data Fellows Oyj
    Inventors: Mikko Hyppönen, Ari Hyppönen, Mikko Kuisha, Urmas Rahu, Risto Siilasmaa