Patents by Inventor Wolfgang E. J. Herrmann

Wolfgang E. J. Herrmann 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).

  • Communication with a downhole tool
    Patent number: 6550538
    Abstract: A system that is usable with a subterranean well includes a downhole assembly and an apparatus. The downhole assembly is adapted to respond to a command that is encoded in a stimulus that is communicated downhole. The apparatus is adapted to change a pressure of a gas in communication with the well to generate the stimulus.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: April 22, 2003
    Assignee: Schlumberger Technology Corporation
    Inventors: Wolfgang E. J. Herrmann, Kenneth R. Goodman, Vladimir Vaynshteyn, Merlin D. Hansen