Patents by Inventor William Hieby Hetzel

William Hieby Hetzel 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).

  • Flexible functionality of stack light
    Publication number: 20030030567
    Abstract: A stack light having both steady and flashing light capabilities is disclosed. In an exemplary embodiment, the light stack or signaling light beacon comprises a light module containing a socket for a lamp, circuitry for operating the light module, and a jumper connector connected to the circuitry for selecting between flashing and steady light within the light module.
    Type: Application
    Filed: August 13, 2001
    Publication date: February 13, 2003
    Inventors: William Hieby Hetzel, Geoffrey Hugh McKay, David James Lesslie, Senya Marie Hiscox Miles, Michael Constantin von Kannewurff, Joseph Patrick Smith