Patents by Inventor Chee K. Han

Chee K. Han 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).

  • Flex circuit vibration sensor
    Patent number: 5526208
    Abstract: A method and apparatus for sensing vibration in a flex circuit located between a rotary actuator and electronics within a disk drive. Specifically, the apparatus contains a strain gauge attached to or imbedded within the flex circuit. The resistivity of the strain gauge varies in response to vibrations on the cable. This resistance variation can be transformed into electrical signals that are used by a servo system to move the actuator assembly in compensatory motion that effectively cancels any off-track motion caused by the vibrations.
    Type: Grant
    Filed: August 17, 1994
    Date of Patent: June 11, 1996
    Assignee: Quantum Corporation
    Inventors: Michael R. Hatch, Joseph T. Castagna, Chee K. Han