Patents by Inventor Harry E. Mussman

Harry E. Mussman 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: 4763317
    Abstract: A switched integrated wideband and narrowband multiservices digital network (FIGS. 1 and 2) is an ISDM providing universal information services based on wideband and narrowband voice, data, and video communications. It comprises a plurality of service areas (100, 101), each served by a central switching node (110). The central node is connected to a plurality of remote nodes (103) by feeder optical fibers (107) and a control bus extension (106). Network interface equipment (104) at subscribers' (102) premises is connected to remote nodes by distribution optical fibers (105). Each distribution fiber is wavelength-division multiplexed and carries modulated (pulse-analog, pulse-code, or differential pulse-code) wideband digital channels (205) and a multiplexed channel (206) comprising 32 time-division-multiplexed narrowband digital channels (207). One narrowband channel (207D) carries all signaling messages.
    Type: Grant
    Filed: December 13, 1985
    Date of Patent: August 9, 1988
    Assignee: American Telephone and Telegraph Company, AT&T Bell Laboratories
    Inventors: Harvey R. Lehman, William P. Lidinsky, Harry E. Mussman, David A. Spicer, David Vlack
  • Patent number: 4656366
    Abstract: To switch a first gated diode switch (GDSL1) to the "OFF" state requires a voltage applied to the gate which is more positive than that of the anode or cathode and a sourcing of current into the gate of substantially the same order of magnitude as flows between the anode and cathode of the first switch. Control circuitry, which uses a second gated diode switch (GDSC) coupled by the cathode to the gate of the first switch (GDSL1), is used to control the state of the first switch (GDSL1). The control circuitry also comprises a first branch circuit coupled to the anode of the GDSC and to a first potential source V1 and a second branch circuit coupled to the anode of GDSC and to a second potential source V2 which is of a lower potential than V1. The second branch circuit has a high voltage and high current capability switch in series between V2 and the anode of GDSC. The first branch circuit has a high voltage but modest current handling switch in series between V1 and the anode of GDSC.
    Type: Grant
    Filed: February 24, 1982
    Date of Patent: April 7, 1987
    Assignee: American Telephone and Telegraph Company AT&T Bell Laboratories
    Inventors: James A. Davis, William F. MacPherson, Harry E. Mussman, Peter W. Shackle
  • Patent number: 4354062
    Abstract: A telephone switching system is disclosed which includes a digitally controllable multifunction signaling circuit responsive to commands from a central processor to generate or to receive subscriber line pulse signals of amplitude and duration specified by the processor commands. A bridge switch amplifier arrangement having an essentially constant voltage input signal and pulse width modulated control, is used to provide a substantially constant amplitude output signal. A two-stage access switch allows the signaling circuit to be time-shared among groups of subscriber lines.
    Type: Grant
    Filed: January 31, 1980
    Date of Patent: October 12, 1982
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Harry E. Mussman
  • Patent number: 4345163
    Abstract: To switch a first gated diode switch (GDS1) to the "OFF" state requires a voltage applied to the gate which is more positive than that of the anode or cathode and a sourcing of current into the gate of substantially the same order of magnitude as flows between the anode and cathode of the first switch. Control circuitry, which uses a second gated diode switch (GDSC) coupled by the cathode to the gate of the first switch (GDS1), is used to control the state of the first switch (GDS1). The control circuitry comprises a first branch circuit coupled to the gate of GDSC and to a first potential source +V1, a second branch circuit coupled to the anode of GDSC and to a second potential source +V2, and a third branch circuit coupled to the anode of GDSC and to a third potential source +V3. The first branch circuit is connected to the gate of the second switch (GDSC) and controls the state thereof.
    Type: Grant
    Filed: May 15, 1980
    Date of Patent: August 17, 1982
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: James A. Davis, William F. MacPherson, Harry E. Mussman, Peter W. Shackle