Patents by Inventor Duncan E. Riddle

Duncan E. Riddle 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 storage media
    Patent number: 5382463
    Abstract: Optical recording tape has a backcoat providing a surface texture designed to impart high static friction between the opposite faces of the tape to enable the tape to maintain pack integrity during storage and transport.
    Type: Grant
    Filed: June 11, 1992
    Date of Patent: January 17, 1995
    Assignee: Imperial Chemical Industries plc
    Inventors: Kelvin P. Adkins, Duncan E. Riddle