Patents by Inventor Daniel L. Downum

Daniel L. Downum 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).

  • Overhead projection highlighting device and method of use
    Patent number: 5013149
    Abstract: A highlighting device and method of use for focusing audience attention on an overhead projection is disclosed whereby a generally flat color tinted and light transmissive body having upper and lower surfaces with an optional handle and feet is employed as a register/highlighter for aligning and emphasizing an information transparency sheet.
    Type: Grant
    Filed: June 2, 1989
    Date of Patent: May 7, 1991
    Inventors: Daniel L. Downum, Robert L. LaFond