Patents by Inventor Randy D. Boyd

Randy D. Boyd 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).

  • System for tracking an article or person
    Patent number: 5708421
    Abstract: A system for tracking articles or persons comprising a base unit for transmitting a series of ultrasonic signals and an alarm signal, a remote unit, removably attached to the article or person, for receiving the series of ultrasonic signals from the base unit and for transmitting an electromagnetic signal upon receipt of the ultrasonic signal from the base unit, and a monitoring unit for receiving the alarm signal.
    Type: Grant
    Filed: August 19, 1996
    Date of Patent: January 13, 1998
    Assignee: Radio Systems Corp.
    Inventor: Randy D. Boyd