Patents by Inventor Ronald N. Cotman

Ronald N. Cotman 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).

  • Circular fluorescent lamp unit
    Patent number: 4316120
    Abstract: A circular fluorescent lamp unit having a compact central hub containing a ballast reactor and provided with a screw base. A replaceable circular lamp assembly is positioned around and attached to the hub.
    Type: Grant
    Filed: October 22, 1980
    Date of Patent: February 16, 1982
    Assignee: General Electric Company
    Inventors: Ronald N. Cotman, Gustino J. Lanese