Patents by Inventor Terence J. Duncan

Terence J. Duncan 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).

  • Low level traffic direction pavement marker
    Patent number: 4815890
    Abstract: A low level traffic direction pavement marker is secured, at spaced distances with others, to early alert, inform, and guide a motorist, via contrast, emphasis, and directional position, in his or her correct vehicle maneuver in a special channelization.
    Type: Grant
    Filed: July 14, 1988
    Date of Patent: March 28, 1989
    Inventor: Terence J. Duncan