Patents Assigned to Sound Alert Limited
  • Locating devices
    Patent number: 6201470
    Abstract: A device usable in a plurality of environments such as in buildings, transport vehicles, pedestrian aids and sirens for producing a locating sound of broad band noise. The broad band noise is formed from frequencies emitted simultaneously within a human hearing range. An alerting sound may also be emitted.
    Type: Grant
    Filed: January 7, 1998
    Date of Patent: March 13, 2001
    Assignee: Sound Alert Limited
    Inventor: Deborah Jane Withington