Patents by Inventor Andreas Imhoff

Andreas Imhoff 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).

  • Optical data network having adjustable delays for switching over to backup unit
    Patent number: 5357360
    Abstract: An optical data network, in which data is exchanged between an active central unit (CU1) and subscriber line units (DU1, DU2, DU3, . . .) using the time-division multiplexing method. The reliability is considerably enhanced by parallel connection of a back-up central unit (CU2). In order to permit a disruption-free switchover between the central units (CU1, CU2), the latter have controllable delay devices (TDL1, RDL1, TDL2, RDL2), so that the delays of the signals to and from the subscriber line units (DU1, DU2, DU3, . . . . ) can be matched with the aid of a special line unit (SDU).
    Type: Grant
    Filed: January 11, 1993
    Date of Patent: October 18, 1994
    Assignee: Siemens Aktiengesellschaft
    Inventors: Andreas Imhoff, Hendrik Keller, Udo Reimann, Walter Wessely