Patents by Inventor Daniel T. Woodriff

Daniel T. Woodriff 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).

  • Background correction in spectro-chemical analysis
    Patent number: 4035083
    Abstract: Various methods and apparatus are disclosed for providing a background corrected measure of the concentration of a sample element in absorption and emission spectro-chemical analysis using the principles of the Zeeman effect and certain other related effects using a magnetic field.
    Type: Grant
    Filed: May 5, 1975
    Date of Patent: July 12, 1977
    Inventors: Ray A. Woodriff, Daniel T. Woodriff