Patents by Inventor Stewart H. Christ

Stewart H. Christ 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: 4831438
    Abstract: The present invention is a "tethered remote" surveillance system that uses a command and control transmitter/receiver to activate selectively a number of audio and video sensors. The system generally comprises a plurality of remote sensors which are selectively controllable through a plurality of remote integral modules to which the sensors are connected. Each integral module is a physically compact unit which includes an antenna for transmitting the outputs of the plural sensors to a command and control station and an antenna for receiving encrypted command signals from the command station. The command station includes an encrypter for generating the command signals, an antenna for transmitting the signals to the integral modules and an antenna for receiving the signals transmitted by the integral modules, as well as devices for displaying and recording the signals received.
    Type: Grant
    Filed: February 25, 1987
    Date of Patent: May 16, 1989
    Assignee: Household Data Services
    Inventors: Alfred H. Bellman, Jr., Mark A. Fowler, Stewart H. Christ