Patents by Inventor Mark Ondrus

Mark Ondrus 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).

  • Dual trace valve system
    Patent number: 5746239
    Abstract: A valve system includes a valve and apparatus for supplying fluids to the valve. The valve includes a valve enclosure and a valve stem movable through the valve enclosure. The valve enclosure includes a valve body and a valve bonnet. The valve system includes a first fluid supply to supply fluid to the region of the valve stem that moves through the valve enclosure, and second and third fluid supplies to supply fluid to a region of contact between the valve body and valve bonnet.
    Type: Grant
    Filed: September 19, 1995
    Date of Patent: May 5, 1998
    Assignee: Hunt-Wesson, Inc.
    Inventor: Mark Ondrus