Patents by Inventor Douglas A. Spencer

Douglas A. Spencer 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).

  • Publication number: 20060202700
    Abstract: A casing inspection device with magnets and flux sensors. The sensors provide measurements of absolute levels of magnetic flux that are indicative of changes in casing thickness and/or permeability.
    Type: Application
    Filed: March 11, 2005
    Publication date: September 14, 2006
    Inventors: Joseph Barolak, Douglas Spencer, Jerry Miller, Bruce Girrell, Jason Lynch, Chris Walter
  • Publication number: 20060202685
    Abstract: A casing inspection device with magnets and flux sensors. Measurements of axial motion of the device are used to get better definition of the axial extent of casing defects. A contact device may be used for motion measurement. The output of the contact device may be used to control the acquisition of flux measurements direction.
    Type: Application
    Filed: March 11, 2005
    Publication date: September 14, 2006
    Inventors: Joseph Barolak, Douglas Spencer, Jerry Miller, Bruce Girrell, Jason Lynch, Chris Walter
  • Publication number: 20040219539
    Abstract: The invention provides methods for treating methylated nucleic acids. In one embodiment, the method can include the steps of (a) providing an alkali environment to a nucleic acid sample; (b) reacting the nucleic acid sample with a bisulphite reagent and incubating the reaction so as to form a treated nucleic acid sample where methylated nucleotides in the nucleic acid sample remain unchanged while unmethylated nucleotides are converted to another form; (c) diluting the treated nucleic acid sample so as to reduce salt concentration to a level which will not substantially interfere with a nucleic acid precipitating step; (d) precipitating the diluted treated nucleic acid to substantially remove any unwanted reagents or diluents from treated nucleic acid; and (e) carrying out de-sulphonation of the precipitated treated nucleic acid so as to remove sulphonate groups present on the treated nucleic acid so as to obtain a nucleic acid sample substantially free of sulphonate groups.
    Type: Application
    Filed: May 2, 2003
    Publication date: November 4, 2004
    Inventors: Douglas Spencer Millar, Cassandra Jean Vockler, Neralie Ann Coulston
  • Publication number: 20040086944
    Abstract: A method for detecting presence of a target DNA in a sample, the method comprising: (a) treating a sample containing DNA with an agent that modifies unmethylated cytosine; (b) providing to the treated sample a detector ligand capable of binding to a target region of DNA and allowing sufficient time for a detector ligand to bind to a target DNA; and (c) measuring binding of the detector ligand to DNA in the sample to determine the presence of the target DNA in a sample.
    Type: Application
    Filed: October 20, 2003
    Publication date: May 6, 2004
    Inventors: Geoffrey Walter Grigg, Peter Molloy, Douglas Spencer Millar
  • Patent number: 6674853
    Abstract: allowing a central business communication system to handle all aspects of call setup on a remote switch. Call control for a telecommunication call set up on a remote switch continues to be handled by the central business communication system; however, the switching of the bearer channels is performed automatically on the remote switch if the telecommunication call is between telecommunication terminals on the remote switch. In addition, if the telecommunication call is between two remote switches, the remote switches will automatically communicate the bearer channels through an interconnecting media without going through the central business communication system.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: January 6, 2004
    Assignee: Avaya Technology Corp.
    Inventors: Joel Ezell, John S. Helton, Norman W. Petty, Douglas A. Spencer, Wayne A. Zakowski
  • Publication number: 20030120923
    Abstract: A secure data authentication apparatus for authenticating the source of a software file for use on a computer system having a secure processing device. The secure data authentication apparatus further authenticating an owner of the software file and authenticates that the owner of the software file is the owner of the computer system that the software file is being installed on. The software file comprising a first source signature and a unique owner signature. The secure processing device generating a second source signature and a second owner signature, wherein if the first and second source signatures match and first and second owner signatures match, the computer system operates accepts the software file as being authenticated for the owners use and from the source represented by the first source signature.
    Type: Application
    Filed: December 21, 2001
    Publication date: June 26, 2003
    Applicant: Avaya Technology Corp.
    Inventors: Robert R. Gilman, Richard L. Robinson, Douglas A. Spencer
  • Publication number: 20030088403
    Abstract: Classifying a call to a called destination endpoint by a call classifier. The call classifier is responsive to information received from the called destination endpoint to perform the call classification.
    Type: Application
    Filed: October 23, 2001
    Publication date: May 8, 2003
    Inventors: Norman C. Chan, Sharmistha Sarkar Das, Douglas A. Spencer, Danny M. Wages
  • Publication number: 20030081756
    Abstract: Classifying a call to a called destination endpoint by a call classifier. The call classifier is responsive to information received from the called destination endpoint to perform the call classification.
    Type: Application
    Filed: October 23, 2001
    Publication date: May 1, 2003
    Inventors: Norman C. Chan, Douglas A. Spencer
  • Publication number: 20030043783
    Abstract: Providing a systematic and comprehensive mechanism for applying echo cancellation within a telecommunication switching system by a local switching system such as a PBX. Echo cancellation circuits are deployed throughout the telecommunication switching system using different types of echo cancellation circuits with each type having different capabilities with respect to a time offset of an echo return signal relative to when an voice signal was generated by a talker. The echo cancellation circuits deployed within the local telecommunication switch are an integral part of trunk circuits and provide the largest time offset. Further, the echo cancellation circuits deployed within in the local telecommunication switch are capable of controlling echoes in either direction with respect to the integral trunk circuit and may be used as service circuits if not needed by the integral trunk circuit.
    Type: Application
    Filed: August 30, 2001
    Publication date: March 6, 2003
    Inventor: Douglas A. Spencer
  • Patent number: 5982783
    Abstract: Port networks (PN 101-103) of a switching system such as a distributed PBX are remoted from and interconnected with each other by an ATM network (100). Each port network includes a port network connectivity (PNC) circuit (113-114) that interfaces it to the ATM network. Only one of the port networks (101) has a system processing element (SPE 111), which controls all of the port networks. Commands issued by the SPE and needed by the ATM network to establish virtual circuits between the port networks are translated (FIG. 2) by a PNC circuit (113) into ATM signaling cells. Commands issued by the SPE and not needed by the ATM network are encapsulated (FIGS. 2 and 3) as payload into ATM traffic cells by the PNC circuit and are sent to destination processor networks through the virtual circuits. At a destination processor network, the encapsulated commands are retrieved (FIGS. 2 and 3) and used for local control.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: November 9, 1999
    Assignee: Lucent Technologies Inc.
    Inventors: Ernest J. Frey, Norman W. Petty, Douglas A. Spencer
  • Patent number: 5862131
    Abstract: A port circuit (108) for a time-division multiplexed (TDM) switching system (100) is designed to effect sub-time-slot operation without external support, as well as to effect conventional, time-slot operation. A clock-frequency multiplier, such as a frequency-multiplexed phase-lock loop (PLL 202), and a multiplier-driven sub-time-slot operation circuit, such as a PLL-driven finite state machine (203), are incorporated into the port circuit. The clock-frequency multiplier and the sub-time-slot operation circuit generate all the additional control signals that are necessary to define sub-time slots and to effect multiple information transfers in a single time slot. The port circuit engages in conventional time-slot transfers with conventional port circuits, whereby it is compatible therewith, and engages in sub-time-slot transfers with other sub-time-slot enabled port circuits, whereby it increases the transfer throughput of the TDM switching fabric.
    Type: Grant
    Filed: October 10, 1996
    Date of Patent: January 19, 1999
    Assignee: Lucent Technologies Inc.
    Inventors: Norman W. Petty, Michael A. Smith, Douglas A. Spencer
  • Patent number: 5713032
    Abstract: A compound document processing system includes: a print driver for generating a data file having commands and comments describing the compound document; a user interface including means for embedding document manipulation commands in the comments generated by the print driver; a document processing module for manipulating the data file; and a module manager responsive to the document manipulation commands embedded in the comments for causing the document processing module to manipulate the data file.
    Type: Grant
    Filed: January 3, 1996
    Date of Patent: January 27, 1998
    Assignee: Eastman Kodak Company
    Inventor: Marc Douglas Spencer
  • Patent number: 5521903
    Abstract: A port system interfaces digital PBX's to any transmission facility having DSX-1 communications ports via a microprocessor controlled PBX port board connected between PBX switch fabric and a first DSX-1 communications port. A channel service unit (CSU) module coupled directly to the port board for communications with DS1 transmission lines defines a second DSX-1 communications port which is coupled to the first DSX-1 communications port. The CSU module also includes a T1 transceiver and line interface circuitry for coupling the CSU module to a DS1 transmission line. The combination of the port board and CSU module provide full functionality of conventional CSU's while the port board alone permits direct coupling of transmission facilities utilizing a DSX-1 communications port. For remote maintenance, a microprocessor of the port board is coupled to a control processor of a PBX for control of the port board microprocessor via the PBX control processor.
    Type: Grant
    Filed: December 27, 1993
    Date of Patent: May 28, 1996
    Assignee: AT&T Corp.
    Inventors: Michael J. English, Michel L. Hearn, David M. Kissel, Douglas A. Spencer, Jeffrey A. Williams, Jerome J. Zelenski
  • Patent number: 5305308
    Abstract: A wireless-access communications system, such as a CDMA cellular radio-telephone system (FIG. 2), comprises a packet-switched communications network (202, 207, 201) that interconnects cells (base stations; 202) with each other and with the public telephone network (100). Traffic of individual calls is packetized, and packet-bearing frames (300 in FIG. 7) of a plurality of calls are then statistically multiplexed and frame-relayed through the network to yield the high capacity, efficiency, and speed of traffic transport and handoff required for a CDMA cellular system. At each call processing unit (264 in FIG. 5), individual calls are handled by individual service circuits (602 & 612) which perform speech-processing functions such as coding and decoding, tone insertion, and echo cancellation, and packet-to-circuit-switched-PCM traffic conversion.
    Type: Grant
    Filed: October 29, 1992
    Date of Patent: April 19, 1994
    Assignee: AT&T Bell Laboratories
    Inventors: Michael J. English, Charles Y. Farwell, Michael L. Hearn, Richard M. Heidebrecht, David M. Kissel, Paul E. Miller, Richard D. Miller, Alan S. Mulberg, Michael A. Smith, Douglas A. Spencer, John S. Thompson, Richard A. Windhausen
  • Patent number: 5278892
    Abstract: A CDMA cellular radio-telephone system (FIG. 2) comprises a packet-switched communications network (202, 207, 201) that interconnects cells (base stations; 202) with each other and with the public telephone network (100). A unique combination of a static addressing plan that uses a different LAPD DLCI (302 in FIG. 7) for each unidirectional virtual call path, direct cell (202)-to-cell and cell-to-call-processing unit (264 in FIG. 5) control information exchanges, and packet-switching techniques that permit call traffic and control communications to share call paths and permit different call paths to share physical resources, is applied to call processing. This enables soft handoffs (FIGS. 27-29) to be handled in a manner transparent to the parties to the call and without significant involvement of system control elements (134 and 261 in FIG. 2) whose involvement would adversely impact the system's call-handling capacity.
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: January 11, 1994
    Assignee: AT&T Bell Laboratories
    Inventors: Brian D. Bolliger, Talmage P. Bursh, Jr., Kelvin K. Ho, Alan S. Mulberg, LaJeana N. Roberts, Kenneth F. Smolik, Douglas A. Spencer, Kenneth W. Strom, John S. Thompson
  • Patent number: 5195090
    Abstract: A wireless-access communications system, such as a CDMA cellular radio-telephone system (FIG. 2), comprises a packet-switched communications network (202, 207, 201) that interconnects cells (base stations; 202) with each other and with the public telephone network (100). Traffic of individual calls is packetized, and packet-bearing frames (300 in FIG. 7) of a plurality of calls are then statistically multiplexed and frame-relayed through the network to yield the high capacity, efficiency, and speed of traffic transport and handoff required for a CDMA cellular system. At each call processing unit (264 in FIG. 5), individual calls are handled by individual service circuits (602 and 612) which perform speech-processing functions such as coding and decoding, tone insertion, and echo cancellation, and packet-to-circuit-switched-PCM traffic conversion.
    Type: Grant
    Filed: July 9, 1991
    Date of Patent: March 16, 1993
    Assignee: AT&T Bell Laboratories
    Inventors: Brian D. Bolliger, Talmage P. Bursh, Jr., Marc K. Dennison, Michael J. English, Charles Y. Farwell, Michel L. Hearn, Richard M. Heidebrecht, Kelvin K. Ho, Kenneth Y. Ho, David M. Kissel, Paul E. Miller, Richard D. Miller, Alan S. Mulberg, LaJeana N. Roberts, Michael A. Smith, Kenneth F. Smolik, Douglas A. Spencer, Kenneth W. Strom, John S. Thompson, Richard A. Windhausen
  • Patent number: 5195091
    Abstract: A CDMA cellular radio-telephone system (FIG. 2) has switching systems (201) synchronized to public telephone network (100) timing signals (600), and radio telephones (203) and cell base stations (202) synchronized to a different clock (1000). Transmission delays between the cell base stations and the telephone network are variable. Switching systems include digital communications interfaces (264) to the telephone system, whose connections to the telephone system are synchronized to the telephone system, and whose connections to the cells are nominally also synchronized to the telephone system but whose processor (602) operates for each call within predefined windows (1302, 1402) of phase relationships to the operation of the cell that is handling the call, and occasionally adjusts (FIGS. 13-16) its phase relationships to the operation of the telephone system to achieve and maintain its operation within the predefined windows.
    Type: Grant
    Filed: July 9, 1991
    Date of Patent: March 16, 1993
    Assignee: AT&T Bell Laboratories
    Inventors: Charles Y. Farwell, Michel L. Hearn, Richard M. Heidebrecht, Kelvin K. Ho, Douglas A. Spencer
  • Patent number: 5184347
    Abstract: A CDMA cellular radio-telephone system (FIG. 2) has switching systems (201) synchronized to public telephone network (100) timing signals (600), and radio telephones (203) and cell base stations (202) synchronized to different clock (1000). Transmission delays between the cell base stations and the telephone network are variable. Switching systems include digital communications interfaces (264) to the telephone system, whose connections to the telephone system are synchronized to the telephone system, and whose connections to the cells are nominally also synchronized to the telephone system but whose processor (602) operates for each call within predefined windows (1302, 1402) of phase relationships to the operation of the cell that is handling the call, and occasionally adjusts (FIGS. 13-16) its phase relationships to the operation of the telephone system to achieve and maintain its operation within the predefined windows.
    Type: Grant
    Filed: July 9, 1991
    Date of Patent: February 2, 1993
    Assignee: AT&T Bell Laboratories
    Inventors: Charles Y. Farwell, Michel L. Hearn, Richard M. Heidebrecht, Kelvin K. Ho, Douglas A. Spencer
  • Patent number: 4894822
    Abstract: A method and apparatus for decreasing delay and use of data processing resources in the reliable transmission of data frames in a packet network. In transmitting data from a source to a destination over a plurality of intermediate data switching points, the data processing required for each frame is selectively varied at each data switching point, according to the requirements for transmission of data frames of a message and of the succeeding link used for that message. A virtual link address is transmitted with each data frame which is translated into the mode of processing the frame at the data switching point, and into the virtual and real address of the next data link. Advantageously, such an arrangement allows for minimizing the data processing load and delay at each protocol handler of the data path through the packet network.
    Type: Grant
    Filed: November 24, 1987
    Date of Patent: January 16, 1990
    Assignee: AT&T Information Systems American Telephone and Telegraph Company
    Inventors: Rolfe E. Buhrke, James A. Davis, Douglas A. Spencer
  • Patent number: 4510596
    Abstract: A PCM switching system requires the assignment of either one or two time slots of a pair of time slots to a port circuit depending upon the type of service (voice only or voice plus data) each port circuit provides. Common resources normally assign a pair of time slots to each port circuit. This wastes time slots when the port circuit is used in a manner (voice only service) that requires only a single time slot. The disclosed arrangement eliminates the wasting of time slots by permitting the on-site reconfiguring of the system resources so that, when desired, only a single time slot can be assigned to a port circuit.
    Type: Grant
    Filed: October 12, 1982
    Date of Patent: April 9, 1985
    Assignee: AT&T Bell Labs
    Inventors: Philip W. Hartmann, Dwight W. Kohs, Douglas A. Spencer, Garry V. Turnbow