Patents by Inventor Charles H. Johnson

Charles H. Johnson 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).

  • Sample positioning apparatus
    Patent number: 3931520
    Abstract: Apparatus for use in alpha particle counting with such as photomultiplier tubes, comprising a platform and linkage mechanism whereby samples are moved in linear manner toward and away from ends of the photomultiplier tubes.
    Type: Grant
    Filed: November 8, 1974
    Date of Patent: January 6, 1976
    Assignee: The United States of America as represented by the United States Energy Research and Development Administration
    Inventors: Thomas H. Bell, Charles H. Johnson, Jr., Robert L. Lane, Bradley E. Martin, William H. Tyree