Patents by Inventor William H. Leonard

William H. Leonard 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).

  • Traffic light control apparatus for emergency vehicles
    Patent number: 6072406
    Abstract: A traffic light control apparatus for emergency vehicles for enabling control of a plurality of traffic signal lights disposed at a controlled intersection by an operator of an emergency vehicle and for disabling a conventional traffic signal light controller used for controlling the operation of the traffic signal lights.
    Type: Grant
    Filed: June 28, 1999
    Date of Patent: June 6, 2000
    Inventors: William H. Leonard, Roger D. Leonard
  • Traffic light control apparatus for emergency vehicles
    Patent number: 5977883
    Abstract: A new Traffic Light Control Apparatus for Emergency Vehicles for enabling control of a plurality of traffic signal lights disposed at a controlled intersection by an operator of an emergency vehicle and for disabling a conventional traffic signal light controller used for controlling the operation of the traffic signal lights.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: November 2, 1999
    Inventors: William H. Leonard, Roger D. Leonard
  • Intersecting optical and copy sheet path method and apparatus
    Patent number: 4134671
    Abstract: A xerographic copying machine is configured such that the copy sheet feed path intersects the optical path. The optical path extends between the document platen at the top of the machine down into the machine to an elevation below a photoreceptor drum and then back up to an exposure station adjacent the drum. The copy sheet path extends generally linearly across the machine along a target line to the top of the photoreceptor drum.
    Type: Grant
    Filed: March 25, 1977
    Date of Patent: January 16, 1979
    Assignee: Xerox Corporation
    Inventor: William H. Leonard