Patents by Inventor Douglas W. Ducker

Douglas W. Ducker 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).

  • Pen with led indicator
    Patent number: 5673996
    Abstract: A retractable writing instrument such as a pen includes a light assembly in the upper portion of the barrel and a push button to extend and retract the writing tip at its lower end. In the upper portion of the barrel are a battery, a lamp, and a switch which selectively completes or breaks an electrical circuit between the battery and the lamp as a result of movement of the push button. The lamp illuminates a portion of the upper barrel which can serve to highlight advertising indicia on the barrel, or provide an indication of the position of the writing tip, or provide some other special effect.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: October 7, 1997
    Inventor: Douglas W. Ducker
  • Combination digital clock and lamp base
    Patent number: D408295
    Type: Grant
    Filed: May 8, 1998
    Date of Patent: April 20, 1999
    Inventor: Douglas W. Ducker