Patents by Inventor L. Dale Mason

L. Dale Mason 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).

  • Indicator of under inflated tire
    Patent number: 4996516
    Abstract: An indicating device adapted to indicate a flat or severely underinflated tire. The device is activated by the enlargement in the diameter of the underinflated tire caused by centrifugal force acting on the tread, and may be especially useful on dual wheels although it will work on others as well. The device includes a contact device which will be contacted by an expanding tire. That contact tilts a switch to cause a circuit to be completed to light a signal lamp in the cab of the truck.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: February 26, 1991
    Inventor: L. Dale Mason