Patents by Inventor Thomas J. Harris

Thomas J. Harris 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).

  • Logic gate system design
    Patent number: 4791578
    Abstract: A method for evaluating the testability of circuit systems containing a plurality of logic gates through evaluating statistical properties in response to selected inputs.
    Type: Grant
    Filed: December 30, 1986
    Date of Patent: December 13, 1988
    Assignee: ETA Systems, Inc.
    Inventors: Dennis Fazio, Thomas J. Harris
  • Friction heat generator
    Patent number: 4524755
    Abstract: An improved friction heater apparatus (10) comprises a thin walled metallic drum (25) sealed on both ends, having a centrally disposed axle (14) mounted therein, and a plurality of free floating friction elements (16) operatively associated with the axle (14), wherein the rotary motion of the axle will impart centrifugal force to the friction elements to radially displace the friction elements with respect to the axle, and into engagement with the wall of the metallic drum (25).
    Type: Grant
    Filed: April 5, 1984
    Date of Patent: June 25, 1985
    Inventors: Harold D. Harris, Thomas J. Harris