Patents by Inventor Roger A. Patterson

Roger A. Patterson 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).

  • Periodically excited level control probe
    Patent number: 4159786
    Abstract: A copy machine having a decorator for applying toner to a latent image is disclosed. The decorator is fitted with a control for sensing the level of toner in the decorator sump which control automatically maintains the amount of toner in the sump at the desired level. The control includes a toner level sensor which is a vibrating rod driven by a decorator roll.
    Type: Grant
    Filed: November 11, 1977
    Date of Patent: July 3, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Nicholas Biddle, III, Roger A. Patterson