Patents Assigned to D2 Technologies Pty Ltd.
  • Door warning system
    Patent number: 6292100
    Abstract: A door warning system comprising a sensor adapted to sense the presence of persons immediately adjacent a first side of a swinging door; an audio or visual alarm responsive to the sensor adapted to advise a person on a second side of the door being opposite the first side of the presence of a person on the first side of the door.
    Type: Grant
    Filed: March 20, 2000
    Date of Patent: September 18, 2001
    Assignee: D2 Technologies Pty Ltd.
    Inventor: David Lawrence Dowling