Patents by Inventor Thomas R. Liethen

Thomas R. Liethen 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).

  • Apparatus for providing interior light to a vehicle
    Patent number: 5188419
    Abstract: An apparatus which increases the amount of daylight entering a truck cab to provide additional cab illumination without directly shining on an operator, including a window located above the windshield and a header extending from the bottom part of the window into the vehicle cab to block the daylight from directly shining on an operator, in one embodiment of which the windshield and window are one piece of glass and include a glass area for marker lights.
    Type: Grant
    Filed: January 8, 1992
    Date of Patent: February 23, 1993
    Assignee: Paccar Inc.
    Inventor: Thomas R. Liethen
  • Truck or truck tractor windshield air ram arrangement
    Patent number: 4235298
    Abstract: A truck or truck tractor having an opening between the base of its windshield and the rear end of its hood. Air pressure in this area drives air through a moisture tray and a collector trap to a conduit to an air cleaner leading to a turbocharger. Rain, snow and/or ice in the air is removed into the moisture tray and the collector trap, and the air cleaner has a moisture filter therein to remove any, slight residue.
    Type: Grant
    Filed: February 28, 1979
    Date of Patent: November 25, 1980
    Assignee: Freightliner Corporation
    Inventors: Roger W. Sackett, Thomas R. Liethen
  • Truck cab
    Patent number: D343597
    Type: Grant
    Filed: January 8, 1992
    Date of Patent: January 25, 1994
    Assignee: PACCAR Inc
    Inventors: Roy L. Meryman, Thomas R. Liethen
  • Truck cab top fairing
    Patent number: D343819
    Type: Grant
    Filed: January 8, 1992
    Date of Patent: February 1, 1994
    Assignee: Paccar Inc
    Inventors: Roy L. Meryman, Thomas R. Liethen