Patents Assigned to R. Donald Plosser
  • Patent number: 4843324
    Abstract: A system for locating a buried structure in which a signal radiating from the structure is measured by its reception on the surface of the earth with the signal being attenuated by a selected amount and then measured by reception at varying distances above the earth with a lesser attenaution, whereby the depth of the object below ground is indicated as a function of signal level differences and attenuation.
    Type: Grant
    Filed: April 14, 1988
    Date of Patent: June 27, 1989
    Assignee: R. Donald Plosser
    Inventors: Thomas G. Humphreys, Jr., George G. Plosser, Michael D. Ryan, Jr.