Patents by Inventor Walt Jehnert

Walt Jehnert 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).

  • Apparatus and method for supervising derived channel communications
    Patent number: 5822423
    Abstract: A supervisory signal for a derived channel data reporting system is implemented as a tone having a frequency capable of transmission using a telephone signal communicating network, including networks incorporating digital equipment, at an attenuated level. The tone preferably has a frequency of from 200 Hz to 300 Hz, and is capable of operating in conjunction with biphase modulated (BPSK), frequency shift keyed (FSK) and multi-tone modulated (MLT) polling systems. Such frequencies are effectively communicated by conventional digital loop carrier systems, despite a limited frequency range, and are of a sufficient magnitude to be detected by the derived channel data reporting system.
    Type: Grant
    Filed: March 20, 1996
    Date of Patent: October 13, 1998
    Assignee: NumereX Investment Corporation
    Inventors: Walt Jehnert, Stephen A. Hughey, James W. Eakes, Roger Raymond Darr