Patents by Inventor Albert A. Baird

Albert A. Baird 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).

  • Proximity indicating equipment
    Patent number: 4247924
    Abstract: A proximity indicator, for example to indicate a safe height of release of a lifeboat, uses pulsed sonar to trigger a bistable circuit into a set state by the transmitted pulses and a reset state by received pulses which exceed a predetermined level. Red and green LEDs are energized when the bistable is set and reset respectively so that green predominates when a safe height is reached.
    Type: Grant
    Filed: March 2, 1979
    Date of Patent: January 27, 1981
    Assignee: National Research Development Corporation
    Inventor: Albert A. Baird