Patents by Inventor H. Randolph Thomas

H. Randolph Thomas 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).

  • Compacted material density measurement and compaction tracking system
    Patent number: 6122601
    Abstract: The present invention provides a two component system to obtain uniform density of compacted materials and track the compaction of the materials. The first component provides an automated, real-time compaction density meter and method of use to measure the density of the compacted material. The second component provides a Geographic Information System (GIS) for tracking compaction of a surface at specific locations. The two components of the present invention combined provide a system to measure the density of the compacted material and record the location of each density measurement. The components of the present invention can be utilized for many compaction operations, such as the roller compaction of concrete, pavement, soil, landfills, and asphalt pavements.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: September 19, 2000
    Assignee: The Penn State Research Foundation
    Inventors: David C. Swanson, H. Randolph Thomas, Amr A. Oloufa