Patents by Inventor Stephen M. Schultheis

Stephen M. Schultheis 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).

  • Constant intensity light source
    Patent number: 4190795
    Abstract: A power apparatus to maintain a lamp at constant intensity by varying power to the lamp in response to changes in the voltage across a light sensing element. That voltage is automatically compared to a preset reference voltage and the output to the lamp is varied such that any difference in those voltages is eliminated.
    Type: Grant
    Filed: September 9, 1977
    Date of Patent: February 26, 1980
    Assignee: Coberly & Associates
    Inventor: Stephen M. Schultheis