Patents by Inventor Hans von Braun

Hans von Braun 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).

  • Device to block unauthorized modem access over a PBX line
    Patent number: 5018190
    Abstract: A modem detector that enables detection of whether a modem is coupled to a phone line. When one is detected, various responses can occur, including: hanging up on the modem; checking if the modem linkage is allowable and, if it is not, then hanging up on the modem; and/or logging in the occurrence of an unauthorized modem access. To provide protection against unauthorized modem access, a digital embodiment can be used at the T1 phone line or an analog embodiment can be used after digital telephone data is converted into analog signals.
    Type: Grant
    Filed: September 21, 1989
    Date of Patent: May 21, 1991
    Assignee: Hewlett-Packard Company
    Inventors: Richard C. Walker, Hans von Braun