US Patent #6,275,214, "[1]Archived 2018-02-24 at the Wayback Machine" Computer presentation system and method with optical tracking of wireless pointer
US Patent #6,952,198, "[2]" System and method for communication with enhanced optical pointer
US Patent #7,091,949, "[3] Computer presentation system and method with optical tracking of wireless pointer"
US Patent #6,275,214, "[1]Archived 2018-02-24 at the Wayback Machine" Computer presentation system and method with optical tracking of wireless pointer