Patents by Inventor Jiunn S. Yu

Jiunn S. Yu 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-cone double-helical downhole logging device
    Patent number: 4489276
    Abstract: A broadband downhole logging device includes a double-helix coil wrapped over a dielectric support and surrounded by a dielectric shield. The device may also include a second coil longitudinally aligned with a first coil and enclosed within the same shield for measuring magnetic permeability of downhole formations and six additional coils for accurately determining downhole parameters.
    Type: Grant
    Filed: January 20, 1982
    Date of Patent: December 18, 1984
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Jiunn S. Yu
  • Compact range for variable-zone measurements
    Patent number: H514
    Abstract: A compact range for testing antennas or radar targets includes a source for directing energy along a feedline toward a parabolic reflector. The reflected wave is a spherical wave with a radius dependent on the distance of the source from the focal point of the reflector.
    Type: Grant
    Filed: February 27, 1987
    Date of Patent: August 2, 1988
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Walter D. Burnside, Roger C. Rudduck, Jiunn S. Yu