Patents by Inventor David Mariani

David Mariani 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).

  • Induction well logging apparatus with transformer coupled phase sensitive detector
    Patent number: 4857852
    Abstract: A well logging apparatus is disclosed which employs slot antennas having a plurality of conductive probes traversing the slot. Also disclosed are a logging apparatus having electrically isolated antenna probes and a logging apparatus with an improved means for generating and applying a reference signal used in phase detection.
    Type: Grant
    Filed: April 27, 1988
    Date of Patent: August 15, 1989
    Assignee: Schlumberger Technology Corp.
    Inventors: Robert L. Kleinberg, Brian Clark, Weng C. Chew, David Mariani
  • Well logging apparatus for determining dip, azimuth, and invaded zone conductivity
    Patent number: 4766384
    Abstract: A well logging apparatus is disclosed which employs slot antennas having a plurality of conductive probes traversing the slot. Also disclosed are a logging apparatus having electrically isolated antenna probes and a logging apparatus with an improved circuit for generating and applying a reference signal used in phase detection.
    Type: Grant
    Filed: June 20, 1986
    Date of Patent: August 23, 1988
    Assignee: Schlumberger Technology Corp.
    Inventors: Robert L. Kleinberg, Brian Clark, Weng C. Chew, David Mariani