Patents by Inventor Cathy Cavanaugh

Cathy Cavanaugh 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).

  • Single track encoder for providing absolute position information
    Patent number: 6140636
    Abstract: An optical encoder provides absolute position information by inducing a position error in its output signal. The position error can be induced in the signal by shifting a slot in an encoder wheel or encoder strip relative to other slots in the encoder wheel. The position error is detected to identify an absolute position of the encoder wheel or the encoder strip.
    Type: Grant
    Filed: March 23, 1998
    Date of Patent: October 31, 2000
    Assignee: Hewlett-Packard Company
    Inventors: Kirkpatrick William Norton, Cathy Cavanaugh