Patents Assigned to GD Air Testing, Inc.
  • Tool and method for soil sampling
    Patent number: 6712161
    Abstract: A containment cartridge for extracting and preserving a soil sample comprises a cylindrical sampling barrel for insertion into the soil for collecting a soil sample.
    Type: Grant
    Filed: August 14, 2002
    Date of Patent: March 30, 2004
    Assignee: GD Air Testing, Inc.
    Inventor: Gesheng Dai