Patents by Inventor Harry Ehlert

Harry Ehlert 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).

  • One shot valve for operating down-hole well working and sub-sea devices and tools
    Patent number: 6382234
    Abstract: This invention relates generally to remotely operated well borehole or sub-sea tools for oilfield use, and more particularly, for a one shot valve useful for activating such well tools or sub-sea devices in a safe and reliable manner.
    Type: Grant
    Filed: September 3, 1997
    Date of Patent: May 7, 2002
    Assignee: Weatherford/Lamb, Inc.
    Inventors: John Birckhead, Harry Ehlert