Patents Assigned to Compac Industries, Inc.
  • Soil moisture signaling device
    Patent number: 4184445
    Abstract: This invention relates to a device that may be inserted into the soil of a potted plant for the purpose of determining the soil moisture content thereof. The device employs a moisture sensitive signalling element and a tube-shaped humidity chamber which provides means for establishing an equilibrium condition between the moisture content of the soil and the moisture content of the air surrounding the signalling element, thereby providing an accurate indicator of soil moisture content.
    Type: Grant
    Filed: January 16, 1978
    Date of Patent: January 22, 1980
    Assignee: Compac Industries, Inc.
    Inventor: Walter H. Burrows
  • Soil moisture soil indicator
    Patent number: D255334
    Type: Grant
    Filed: September 6, 1977
    Date of Patent: June 10, 1980
    Assignee: Compac Industries, Inc.
    Inventors: Bernard T. Corbin, Douglas D. Miller