Patents by Inventor Stephen R. Ratzel

Stephen R. Ratzel 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).

  • Video conference system including a non-reserved video conference capability
    Patent number: 5530472
    Abstract: A system for controlling a video-conference network by the end user at a video conference site which is comprised of a public telecommunications network connected to video-conference controllers at the video conference sites. The video-conference controllers allow the end user to issue single commands which initiate an automated sequence resulting in implementation of the end user command. The commands are designed to provide the end user with real time control of video-conferencing.
    Type: Grant
    Filed: June 29, 1993
    Date of Patent: June 25, 1996
    Assignee: Sprint Communications Company L.P.
    Inventors: Susan P. Bregman, Sandra S. Greenstein, Tina E. Mayland, John M. McCloskey, Stephen R. Ratzel