Patents by Inventor David Spencer

David 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).

  • Patent number: 7430295
    Abstract: A method and system for distributing quantum cryptographic keys among a group of user devices through a switch connected to the user devices are provided. A switch [1000] establishes a connection between two user devices [405a, 405b] according to a schedule. A Quantum Key Distribution (QKD) session is established between the two user devices [405a, 405b] to facilitate sharing of secret key material between the two user devices. Connections and QKD sessions may be established for different pairs of the user devices.
    Type: Grant
    Filed: March 9, 2004
    Date of Patent: September 30, 2008
    Assignee: BBN Technologies Corp.
    Inventors: David Spencer Pearson, Brig Barnum Elliott
  • Publication number: 20080214820
    Abstract: This invention relates to novel enantiomers useful as monoamine neurotransmitter re-uptake inhibitors. In other aspects the invention relates to the use of these compounds in a method for therapy and to pharmaceutical compositions comprising the compounds of the invention.
    Type: Application
    Filed: December 15, 2005
    Publication date: September 4, 2008
    Applicant: NeuroSearch A/S
    Inventors: Dan Peters, David Tristram Brown, Borje Egestad, Eva Dam, David Spencer Jones, Brian Frostrup, Elsebet Ostergaard Nielsen, Gunnar M. Olsen, John Paul Redrobe
  • Patent number: 7404950
    Abstract: The present invention is directed to a composition and method which to treat diseases and to enhance a regulated immune response. More particularly, the present invention is drawn to compositions that are based on dendritic cells modified to express an inducible form of a co-stimulatory polypeptide.
    Type: Grant
    Filed: February 18, 2004
    Date of Patent: July 29, 2008
    Assignee: Baylor College of Medicine
    Inventors: David Spencer, Brent Hanks, Kevin Slawin
  • Patent number: 7287739
    Abstract: A well choke has a quick closure device quickly moving the choke element to a closed position. The closure device mounts between an actuator and a choke. The actuator has a stepper motor and gear train for incrementally moving an actuator rod and a choke element linearly. The quick closure has a hydraulic cylinder that will move the entire actuator, including the actuator rod, toward the choke, when actuated.
    Type: Grant
    Filed: November 1, 2005
    Date of Patent: October 30, 2007
    Assignee: Vetco Gray Inc.
    Inventors: Dean Arnison, David Spencer, Dominic Stott
  • Publication number: 20070205891
    Abstract: A network enabled radiation detection system includes a sensor configured for measuring radiation; a microprocessor configured for receiving data from the sensor related to radiation; memory operatively associated with the microprocessor; software code configured for time stamping data related to radiation, and for storing data, subsequent to time stamping, in the memory; and wireless communication equipment configured for transmitting a message with the data related to radiation to another device. A method of monitoring radiation with a network enabled radiation detection system includes measuring radiation with a sensor; receiving data into a microprocessor related to the radiation; time stamping the data related to radiation; storing the data in memory; and transmitting the data to a base station.
    Type: Application
    Filed: January 31, 2007
    Publication date: September 6, 2007
    Inventors: David Spencer, Rahmat Aryaeinejad
  • Patent number: 7242774
    Abstract: A quantum cryptography system [100] may include a transmitter [110] configured to generate entangled first and second photons, modulate and detect the first photon, and transmit detection information and the second photon. The system [100] may also include a receiver [160] configured to modulate the second photon. The receiver [160] may also be configured to detect the second photon based on the detection information.
    Type: Grant
    Filed: June 16, 2003
    Date of Patent: July 10, 2007
    Assignee: BBN Technologies Corp.
    Inventors: Brig Barnum Elliott, John D. Schlafer, David Spencer Pearson
  • Patent number: 7236597
    Abstract: Methods, apparatus, and systems are provided for distributing a key between nodes. The nodes are provided separate links for carrying messages versus keying information or material. The links for carrying messages couple the nodes to a messaging network, such as the Internet. In addition, the nodes are coupled together in a key distribution network by specialized links for carrying keying information or material. The links for keying information or material are configured to ensure the security of the keying information or material. The nodes that neighbor each other in the key distribution network establish respective pairwise keys. Once the pairwise keys are established, a set of non-neighboring nodes establish a shared key by communicating a sequence of bits through the messaging network. In order to ensure the security of the sequence of bits, the sequence of bits is encrypted based on the respective pairwise keys of neighboring nodes as it is forwarded in messages through the messaging network.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: June 26, 2007
    Assignee: BBN Technologies Corp.
    Inventors: Brig Barnum Elliott, David Spencer Pearson
  • Patent number: 7217831
    Abstract: An insecticide of formula 1 and the agriculturally acceptable salts thereof, wherein: R1 is selected from the group consisting of: the group OR5 wherein R5 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, cycloalkyl, substituted cycloalkyl, heterocyclic and substituted heterocyclic; the group —NR6OH wherein R6 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, carbocyclic and substituted carbocyclic; the group NR7R8 wherein R7 and R8 are independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl and carbocyclic; and the group wherein R1 is linked to R2 to form a diradical bridging group; R2 and R3 are independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, carbocyclic, substituted carbocyclic, aryl, substituted aryl, acyl and substituted acyl; and A is a diradical linking group which has a molecular weight of preferably
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: May 15, 2007
    Assignee: Nufarm - Australia Limited
    Inventors: Richard Mark Sandeman, David Spencer Chandler, Ann Maree Duncan, Phillip Maxwell Hay
  • Publication number: 20070095411
    Abstract: A well choke has a quick closure device quickly moving the choke element to a closed position. The closure device mounts between an actuator and a choke. The actuator has a stepper motor and gear train for incrementally moving an actuator rod and a choke element linearly. The quick closure has a hydraulic cylinder that will move the entire actuator, including the actuator rod, toward the choke, when actuated.
    Type: Application
    Filed: November 1, 2005
    Publication date: May 3, 2007
    Inventors: Dean Arnison, David Spencer, Dominic Stott
  • Publication number: 20070030953
    Abstract: Disclosed herein is a metal sorting device including an X-ray tube, a dual energy detector array, a microprocessor, and an air ejector array. The device senses the presence of samples in the x-ray sensing region and initiates identifying and sorting the samples. After identifying and classifying the category of a sample, at a specific time, the device activates an array of air ejectors located at specific positions in order to place the sample in the proper collection bin.
    Type: Application
    Filed: August 3, 2006
    Publication date: February 8, 2007
    Inventors: Edward Sommer, Charles Roos, David Spencer, R. Conley
  • Publication number: 20060239401
    Abstract: A system and process for classifying a piece of material of unknown composition at high speeds, where the system connected to a power supply. The piece is irradiated with first x-rays from an x-ray source, causing the piece to fluoresce x-rays. The fluoresced x-rays are detected with an x-ray detector, and the piece of material is classified from the detected fluoresced x-rays. Detecting and classifying may be cumulatively performed in less than one second. An x-ray fluorescence spectrum of the piece of material may be determined from the detected fluoresced x-rays, and the detection of the fluoresced x-rays may be conditioned such that accurate determination of the x-ray fluorescence spectrum is not significantly compromised, slowed or complicated by extraneous x-rays. The piece of material may be classified by recognizing the spectral pattern of the determined x-ray fluorescence spectrum. The piece of material may be flattened prior to irradiation and detection.
    Type: Application
    Filed: February 17, 2006
    Publication date: October 26, 2006
    Applicant: Spectramet, LLC
    Inventors: Edward Sommer, Robert Parrish, David Spencer, Charles Roos
  • Patent number: 7116640
    Abstract: A communications apparatus (2) in a communications network (100 or 110) is provided for communication among a plurality of communication apparatuses. The communications apparatus (2) routes messages for neighboring apparatuses. The communications apparatus (2) includes a memory (4, 7 or 8), a processor (3) and a transceiver (6). The memory has a plurality of routing managers (12, 13, and 14) stored thereon, and each manager maintains at least one network table including one or more entries. The processor 3 selects at least one network table from those maintained by the plurality of routing managers (12, 13 and 14) that are stored in the memory (4, 7 or 8), based on an address indicator and/or on a type-of-service of a message. The processor 3 extracts network information from the selected network table or tables. The processor (3) also controls transmission of the message according to the extracted network information. The transceiver (6) transmits and receives messages.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: October 3, 2006
    Inventors: Mitchell Paul Tasman, Jason Keith Redi, David Spencer Pearson
  • Publication number: 20060194230
    Abstract: The present invention regards expression profiles of one or more nucleic acids indicative of the presence of, susceptibility to, and/or predicting response to therapy of benign prostatic hyperplasia (BPH) in an individual. The present invention identifies pathways not previously associated with BPH, therefore presenting novel diagnostic and therapeutic targets for the condition.
    Type: Application
    Filed: January 25, 2006
    Publication date: August 31, 2006
    Applicant: BAYLOR COLLEGE OF MEDICINE
    Inventors: Jonathan Levitt, Kevin Slawin, Eduardo Canto, David Spencer, Michael Ittmann
  • Publication number: 20060171504
    Abstract: Disclosed herein is a metal sorting device including an X-ray tube, a dual energy detector array, a microprocessor, and an air ejector array. The device senses the presence of samples in the x-ray sensing region and initiates identifying and sorting the samples. After identifying and classifying the category of a sample, at a specific time, the device activates an array of air ejectors located at specific positions in order to place the sample in the proper collection bin.
    Type: Application
    Filed: March 1, 2005
    Publication date: August 3, 2006
    Inventors: Edward Sommer, Charles Roos, David Spencer
  • Publication number: 20060078969
    Abstract: Dimerization and oligomerization of proteins are general biological control mechanisms that contribute to the activation of cell membrane receptors, transcription factors, vesicle fusion proteins, and other classes of intra- and extracellular proteins. We have developed a general procedure for the regulated (inducible) dimerization or oligomerization of intracellular proteins. In principle, any two target proteins can be induced to associate by treating the cells or organisms that harbor them with cell permeable, synthetic ligands.
    Type: Application
    Filed: July 5, 2005
    Publication date: April 13, 2006
    Inventors: Gerald Crabtree, Stuart Schreiber, David Spencer, Thomas Wandless, Steffan Ho, Peter Belshaw
  • Patent number: 7020501
    Abstract: A system for conserving energy in a multi-node network (110) includes nodes (205) configured to organize themselves into tiers (305, 310, 315). The nodes (205) are further configured to produce a transmit/receive schedule at a first tier (310) in the network (110) and control the powering-on and powering-off of transmitters and receivers in nodes (205) in a tier adjacent (315) to the first tier (310) according to the transmit/receive schedule.
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: March 28, 2006
    Assignee: BBNT Solutions LLC
    Inventors: Brig Barnum Elliott, David Spencer Pearson
  • Publication number: 20060035325
    Abstract: We have developed a general procedure for the regulated (inducible) dimerization or oligomerization of intracellular proteins and disclose methods and materials for using that procedure to regulatably initiate cell-specific apoptosis (programmed cell death) in genetically engineered cells.
    Type: Application
    Filed: January 18, 2005
    Publication date: February 16, 2006
    Applicants: The Board of Trustees of the Leland Stanford Junior University, President and Fellows of Harvard College
    Inventors: Gerald Crabtree, Stuart Schreiber, David Spencer, Thomas Wandless, Peter Belshaw
  • Publication number: 20060013360
    Abstract: A system and process for classifying a piece of material of unknown composition at high speeds, where the system connected to a power supply. The piece is irradiated with first x-rays from an x-ray source, causing the piece to fluoresce x-rays. The fluoresced x-rays are detected with an x-ray detector, and the piece of material is classified from the detected fluoresced x-rays. Detecting and classifying may be cumulatively performed in less than one second. An x-ray fluorescence spectrum of the piece of material may be determined from the detected fluoresced x-rays, and the detection of the fluoresced x-rays may be conditioned such that accurate determination of the x-ray fluorescence spectrum is not significantly compromised, slowed or complicated by extraneous x-rays. The piece of material may be classified by recognizing the spectral pattern of the determined x-ray fluorescence spectrum. The piece of material may be flattened prior to irradiation and detection.
    Type: Application
    Filed: September 22, 2005
    Publication date: January 19, 2006
    Inventors: Edward Sommer, Robert Parrish, David Spencer, Charles Roos
  • Patent number: 6985476
    Abstract: The present invention helps increase the reliability, throughput, and ease-of-configuration for data networks. The invention sets “time-to-live” (“TTL”) values for packets which may be routed through a network within a router based on a selected route, rather than by a host computer or using a fixed pre-configured value. Upon receiving an incoming data packet from a host computer, a TTL value is set which tailored to network conditions and the route selected. The data packet is then routed within the network using the tailored TTL and is discarded more quickly than if a large default value were used.
    Type: Grant
    Filed: August 20, 2001
    Date of Patent: January 10, 2006
    Assignee: BBNT Solutions LLC
    Inventors: Brig Barnum Elliott, David Spencer Pearson
  • Publication number: 20050262592
    Abstract: The present invention provides methods and compositions for the production of recombinant plasminogen, microplasminogen, and fragments thereof in a duckweed expression system. It is the novel finding of the present invention that a duckweed expression system may be used to produce high levels of plasminogen and microplasminogen. The duckweed-produced plasminogen and microplasminogen can be activated to produce a polypeptide having protease activity. Thus, the invention encompasses methods for the expression of plasminogen, microplasminogen, and fragments thereof in duckweed, duckweed plants that are transformed with expression cassettes for the expression of plasminogen, microplasminogen, and fragments thereof, and nucleic acids comprising nucleotide sequences encoding plasminogen, microplasminogen, and fragments thereof, where these nucleotide sequences are modified to enhance their expression in duckweed.
    Type: Application
    Filed: February 11, 2005
    Publication date: November 24, 2005
    Applicant: Biolex, Inc.
    Inventors: David Spencer, Lynn Dickey, John Gasdaska, Xiaowei Wang, Kevin Cox, Charles Peele