Patents by Inventor Dirk Lee Sumrall

Dirk Lee Sumrall 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).

  • Pressure regulating tire valve and core
    Patent number: 6302138
    Abstract: The present invention is related to air pressure valve stems and gauges. More particularly, this invention relates particularly to tire stem valves possessing a built-in calibrated air pressure regulator and an optional integrated air pressure indicator.
    Type: Grant
    Filed: May 3, 2000
    Date of Patent: October 16, 2001
    Assignee: Sumnett Corporation
    Inventor: Dirk Lee Sumrall
  • Pressure regulating tire valve and core
    Patent number: 6142168
    Abstract: The present invention is related to air pressure valve stems and gauges. More particularly, this invention relates particularly to tire stem valves possessing a built-in calibrated air pressure regulator and an optional integrated air pressure indicator.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: November 7, 2000
    Assignee: Sumnett Corporation
    Inventor: Dirk Lee Sumrall