Patents by Inventor Alfred C. Hartman

Alfred C. Hartman 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).

  • Bulk electronic message detection by header similarity analysis
    Patent number: 7831677
    Abstract: Methods, apparatuses, and computer-readable media for detecting bulk electronic messages using header similarity analysis. Bulk electronic messages can be detected by parsing (115) header fields of an electronic message; associating (120) at least one constituent unit with each header field defining a set of constituent units for each header field; ascertaining (230) a feature vector for each set of constituent units; forming (240) a collection of feature vectors; and computing (250) an inner product from a set of constituent units from an additional electronic message and the collection of feature vectors from the initial electronic message resulting in a measure of similarity between the initial electronic message and the additional electronic message.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: November 9, 2010
    Assignee: Symantec Corporation
    Inventors: Alfred C. Hartman, Carey S. Nachenberg