Patents Assigned to Light Guard Systems, Inc.
  • In-roadway warning light apparatus with moisture protection
    Patent number: 8454188
    Abstract: An in-roadway warning light (IRWL) apparatus incorporates a dove prism in the light beam path to embed an air gap inside the IRWL signal head housing and ensure that light from the LEDs is projected in the desired direction, while simultaneously providing moisture protection for the LEDs and associated electronics in the housing.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: June 4, 2013
    Assignee: Light Guard Systems, Inc.
    Inventors: Michael A Harrison, Dave Michaelson