Patents by Inventor James G. Ricketts

James G. Ricketts 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).

  • Patent number: 5218344
    Abstract: A method and system for monitoring personnel in an institution such as a correctional facility, hospital, school, military installation, and the like, includes a computer connected with one or more stationary transceivers in a defined area of the facility, and a portable transceiver unit worn by each individual who is to be monitored. The computer sends command signals to the stationary transceivers, which broadcast interrogation signals to the portable units. The portable units are configured to respond only to interrogation signals unique to that individual, and upon decoding an interrogation signal incident thereon, broadcast a response signal to the stationary transceivers. The stationary transceivers relay corresponding data to the computer, where the data is analyzed to provide an indication of the number, location and identity of the individuals.
    Type: Grant
    Filed: July 31, 1991
    Date of Patent: June 8, 1993
    Inventor: James G. Ricketts