Patents by Inventor Alex Keith

Alex Keith 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).

  • Method and system for document image feature extraction
    Patent number: 6006226
    Abstract: A set of image feature extraction techniques to locate and group documents based upon appearance in a database management system. The system automatically determines visual characteristics of document images and collects documents together according to the relative similarity of their document images. The system is operable on both binary and grayscale images.
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: December 21, 1999
    Assignees: Ricoh Company Limited, Ricoh Corporation
    Inventors: John F. Cullen, Alex Keith, Ahmad Zandi