Patents by Inventor John W. Hummel

John W. Hummel 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).

  • Soil test apparatus
    Patent number: 5038040
    Abstract: A soil test apparatus for field use comprises structure adapting the apparatus for transport over a field for testing the soil thereof; an infrared radiation generator for producing infrared radiation at a plurality of predetermined wavelengths, an elongate light carrying member coupled to the infrared radiation generator and extending therefrom for directing infrared radiation onto the soil; and a light detector for detecting infrared radiation reflected from the soil and for producing corresponding electrical signals.
    Type: Grant
    Filed: September 22, 1989
    Date of Patent: August 6, 1991
    Assignee: AGMED Inc.
    Inventors: Robert C. Funk, Kenneth A. Sudduth, John W. Hummel