Patents Represented by Attorney David Garrod
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Patent number: 8352265Abstract: A hardware implemented backend search stage, or engine, for a speech recognition system is provided. In one embodiment, the backend search engine includes a number of pipelined stages including a fetch stage, an updating stage which may be a Viterbi stage, a transition and prune stage, and a language model stage. Each active triphone of each active word is represented by a corresponding triphone model. By being pipelined, the stages of the backend search engine are enabled to simultaneously process different triphone models, thereby providing high-rate backend searching for the speech recognition system. In one embodiment, caches may be used to cache frequently and/or recently accessed triphone information utilized by the fetch stage, frequently and/or recently accessed triphone-to-senone mappings utilized by the updating stage, or both.Type: GrantFiled: December 22, 2008Date of Patent: January 8, 2013Inventors: Edward Lin, Rob A. Rutenbar
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Patent number: 8155938Abstract: The invention provides methods for enhancing circuit reliability under statistical process variation. For highly replicated circuits such as SRAMs and flip flops, a rare statistical event for one circuit may induce a not-so-rare system failure. To combat this, the invention discloses the method called “Statistical Blockade,” a Monte Carlo-type technique that allows the efficient filtering—blocking—of unwanted samples insufficiently rare in the tail distributions of interest, with speedups of 10-100×. Additionally, the core Statistical Blockade technique is further extended in a “recursive” or “bootstrap” formulation to create even greater efficiencies under a much wider variety of circuit performance metrics, in particular two-sided metrics such a Data Retention Voltage (DRV) which prior Monte Carlo techniques could not handle.Type: GrantFiled: March 28, 2008Date of Patent: April 10, 2012Assignee: Carnegie Mellon UniversityInventors: Amith Singhee, Rob Rutenbar
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Patent number: 8004315Abstract: The invention provides a reduced complexity layout style based on applying a limited set of changes to an underlying repeated base template. With the templates properly defined in accordance with the characteristic features disclosed, the invention enables efficient implementation of logic circuitry, with a dramatic reduction in the pattern complexity (or number of unique layout patterns at each mask level) for realistically sized designs. This reduction in pattern complexity that the invention provides is particularly important for advanced and emerging semiconductor processes, because it enables effective use of SMO and full-chip mask optimization.Type: GrantFiled: August 10, 2010Date of Patent: August 23, 2011Assignee: PDF Solutions, Inc.Inventor: Tejas Jhaveri
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Patent number: 7969199Abstract: The invention provides a reduced complexity layout style based on applying a limited set of changes to an underlying repeated base template. With the templates properly defined in accordance with the characteristic features disclosed, the invention enables efficient implementation of logic circuitry, with a dramatic reduction in the pattern complexity (or number of unique layout patterns at each mask level) for realistically sized designs. This reduction in pattern complexity that the invention provides is particularly important for advanced and emerging semiconductor processes, because it enables effective use of SMO and full-chip mask optimization.Type: GrantFiled: July 27, 2010Date of Patent: June 28, 2011Assignee: PDF Solutions, Inc.Inventor: Tejas Jhaveri
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Patent number: 7192403Abstract: The invention relates to methods, apparatus, articles-of-manufacture, and coded data signals for measuring cardiac output, limb blood flow, perfusion, blood pressure, artery elasticity, and cardiovascular deterioration and disease, including performing these measurements on a continuous heart beat-by-beat basis, for humans and animals. Unlike empirical methods of other noninvasive blood pressure concepts, the invention is grounded on scientifically appropriate hemodynamic principles that studies have validated as accurate, and is practical for wide clinical use. Devices constructed in accordance with the invention can be comfortably employed for numerous applications, including hospital monitoring, physician's office cardiovascular disease management and drug therapy monitoring, home monitoring, and athletic applications.Type: GrantFiled: August 16, 2002Date of Patent: March 20, 2007Inventor: Ted W. Russell
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Patent number: 7093004Abstract: The invention provides an off-the-shelf product solution to target the specific needs of commercial users with naturally parallel applications. A top-level, public API provides a simple “compute server” or “task farm” model that dramatically accelerates integration and deployment. A number of described and claimed adaptive scheduling and caching techniques provide for efficient resource and/or network utilization of intermittently-available and interruptible computing resource in distributed computing systems.Type: GrantFiled: November 27, 2002Date of Patent: August 15, 2006Assignee: DataSynapse, Inc.Inventors: James Bernardin, Peter Lee, James Lewis
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Patent number: 6166365Abstract: A photosensor comprises a cathode portion (111) sensitive to radiation and/or particles, an anode portion (114) receiving electrons, an evacuated channel (112, 113, 200) having the cathode portion attached to its one end portion in a vacuum-tight manner and the anode portion attached to its other end portion in a vacuum-tight manner, a conductive or semiconductive layer (107) at least partially covering the inner surface of the evacuated channel, wherein the channel is formed of a tubular member (106). A method of manufacturing a channel electron multiplier comprises the steps of forming a tubular member and a conductive or semiconductive layer at least on parts of its inner surface, forming an anode portion and sealing it to the tubular member, evacuating the tubular member, forming a cathode portion sensitive to radiation and/or particles, and sealing the cathode portion to the evacuated tubular member. The detector may at least partially be packed into a casting compound.Type: GrantFiled: July 16, 1998Date of Patent: December 26, 2000Assignees: Schlumberger Technology Corporation, Heimannn Optoelectronics GmbHInventors: John J. Simonetti, Raimund Barden
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Patent number: 6115670Abstract: The present invention involves a method for modeling the response of an electromagnetic tool to a subsurface formation including: (i) formulating a set of frequency-domain Maxwell equations, including a Maxwell operator, using a three-dimensional representation of the subsurface formation; (ii) generating a Krylov subspace from inverse powers of the Maxwell operator by computing actions of an inverse of the Maxwell operator; and (iii) repeating (ii) as needed to achieve convergence of a frequency-domain solution that characterizes the modeled response of the electromagnetic tool to the subsurface formation. The invention further involves a related apparatus for modeling the response of an electromagnetic tool to a subsurface formation and a related article of manufacture having a computer program that causes a computer to perform the inventive method.Type: GrantFiled: December 4, 1997Date of Patent: September 5, 2000Assignee: Schlumberger Technology CorporationInventors: Vladimir L'vovich Druskin, Ping Lee, Leonid Aronovich Knizhnerman
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Patent number: 6097786Abstract: A method and apparatus for characterizing a multiphase mixture by irradiating the mixture with X-rays, collecting the photons that emanate from the mixture in response to the irradiation, generating a signal responsive to the aggregate energy of the collected photons, and analyzing the signal to characterize the mixture. Preferably, the mixture is irradiated by repetitively pulsing an X-ray tube and the photons are collected using a multi-layer detector. The method and apparatus may be used to determine the flow rate, flow velocities, and/or composition of the multiphase mixture. In other embodiments, a plurality of X-ray sources and/or detectors may be used.Type: GrantFiled: May 18, 1998Date of Patent: August 1, 2000Assignee: Schlumberger Technology CorporationInventors: Joel Groves, Harold Pfutzner, Jean-Pierre Poyet, Peter Wraight
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Patent number: 6070125Abstract: A computer-based apparatus for creating subsurface models having a graphical display device, a user input device, means for selecting a region of the world to be modeled; means for providing geophysical and geographical data corresponding to the selected region of the world; means for providing an archive of known geological structures; and means for providing an interface which permits a user to create a subsurface model of the identified region. The invention further involves related computer-based apparatuses for interactive creation of geological subsurface models, for managing geological hypotheses, and for providing information for creation of a geological model.Type: GrantFiled: December 1, 1997Date of Patent: May 30, 2000Assignee: Schlumberger Technology CorporationInventors: William F. Murphy, Andrew J. Reischer, John J. Orrange, Ian D. Bryant, Allison M. Fazio
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Patent number: 6044328Abstract: A computer implemented-method of creating subsurface models, including, for example, the steps of: selecting a region of the world to be modeled; providing geophysical and geographical data corresponding to the selected region; providing an archive of known geological structures; and providing an interface which permits a user to create a subsurface model of the identified region. The invention further involves related computer-implemented methods for interactive creation of geological subsurface models, for managing geological hypotheses, and for providing information for creation of geological models.Type: GrantFiled: December 1, 1997Date of Patent: March 28, 2000Assignee: Schlumberger Technology CorporationInventors: William F. Murphy, Andrew J. Reischer, John J. Orrange, Ian D. Bryant, Allison M. Fazio
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Patent number: 6035255Abstract: An article of manufacture for use in connection with a computer, said article of manufacture comprising a computer-readable storage medium having a program recorded thereon that enables a user of a computer executing said program to interactively: display data obtained from a subsurface area; select an object from a plurality of different three-dimensional objects; place the selected three-dimensional object within a model of the subsurface area; and transform the selected three-dimensional object to better fit the data obtained from the subsurface area. The invention further involves related methods for interactive creation of a subsurface model.Type: GrantFiled: December 1, 1997Date of Patent: March 7, 2000Assignee: Schlumberger Technology CorporationInventors: William F. Murphy, Andrew J. Reischer, John J. Orrange, Ian D. Bryant, Allison M. Fazio
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Patent number: 6008646Abstract: The instruments of a pulsed nuclear magnetic resonance device are included in a drill collar for evaluating earth formations. The resulting tool makes NMR measurements through an electrically non-conductive shield while the formation is being drilled.Type: GrantFiled: March 19, 1998Date of Patent: December 28, 1999Assignee: Schlumberger Technology CorporationInventors: Douglas D. Griffin, James Stephen Hall, Abdurrahman Sezginer
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Patent number: 5956132Abstract: To discriminate optically between the various phases in a three-phase fluid, a light beam (F) of non-zero divergence is injected into a detector block (10) made of a material whose refractive index is greater than the refractive indices of all three phases of the fluid. The block (10) has a sensitive zone (18) and a total reflection zone (20) such that incident rays (Ri) parallel to the axis (12) of the block strike the sensitive zone (17) at an angle of incidence (.THETA.i) and are returned parallel to the axis (12) by the total reflection zone (20). The angle of incidence (.THETA.i) is such that a first phase gives rise to almost total reflection, a second phase gives rise to almost total transmission, and a third phase gives rise to partial transmission and partial reflection.Type: GrantFiled: May 22, 1997Date of Patent: September 21, 1999Assignee: Intellectual Property Law Dept. Schlumberger-Doll ResearchInventor: Eric Paul Donzier
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Patent number: 5914598Abstract: A permanent magnet of a pulsed nuclear magnetic resonance (NMR) device is positioned within a drill collar for evaluating earth formations. In this way, the torsional and bending strengths of the drill collar are maximized with relatively little sacrifice of the magnetic moment of the permanent magnet. The resulting tool makes NMR measurements while the formation is being drilled. An antenna for producing and detecting an oscillating RF field in the earth formation is either located in a groove in the outer surface of the drill collar, or in an alternative embodiment, the drill collar itself serves as an RF antenna.Type: GrantFiled: October 8, 1996Date of Patent: June 22, 1999Assignee: Schlumberger Technology CorporationInventors: Abdurrahman Sezginer, Robert L. Kleinberg
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Patent number: 5912459Abstract: A method of locating in situ hydrocarbons in underground formations comprises illuminating the borehole wall with light such as visible, infrared or ultraviolet light or combinations of these, from a source in a tool such as a wireline logging tool or an LWD tool, detecting any fluorescent radiation with a detector in the tool and analyzing the florescent radiation to determine the presence of hydrocarbon in the formation. The tool is moved through the borehole while irradiating the formation and detecting fluorescence. The borehole wall is illuminated and fluorescence detected through a window in the tool which is pressed against the borehole wall with sufficient force to displace any mudcake. The window is made of a wear resistant material such sapphire or diamond and is conveniently secured in a wear resistant housing which might be made of tungsten carbide or the like.Type: GrantFiled: June 12, 1997Date of Patent: June 15, 1999Assignee: Schlumberger Technology CorporationInventors: Oliver C. Mullins, Xu Wu, Philip Rabbito
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Patent number: 5910654Abstract: A method/apparatus for determining the density of a formation traversed by a borehole having irregularities along the borehole wall preferably employs/includes a housing, a photon source, and a detector. The source preferably includes an irradiation path extending from the source to a side of the housing. Similarly, the detector preferably includes a detection path extending from the detector to the side of the housing. A stylus may be mounted onto the housing for penetrating through a layer of mudcake. Such stylus preferably includes a base and a substantially small contact head having a window fixedly attached thereto. A second irradiation path may extend from the base to the contact head. A second detection path may also extend from the base to the contact head. The irradiation and detection paths in the stylus are preferably substantially aligned with respective irradiation and detection paths in the housing.Type: GrantFiled: August 20, 1996Date of Patent: June 8, 1999Assignee: Schlumberger Technology CorporationInventors: Arthur J. Becker, Peter D. Wraight
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Patent number: 5910789Abstract: In a method for integrity monitoring in position determination by means of the Global Positioning System (GPS), especially by means of differential GPS (DGPS) or multi-station DGPS, wherein there is employed a monitor station (M) with a first GPS receiver, provided at a location with a known geographical position, GPS-based position measurement results are transferred on a communication line from the monitor station (M) to a user location (F) the integrity of whose geographical position has to be monitored by means of a second GPS receiver provided at the location (F).Type: GrantFiled: August 28, 1997Date of Patent: June 8, 1999Assignee: Geco A.S.Inventor: Erik Vigen
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Patent number: 5838633Abstract: A method of estimating formation in-situ stress magnitude and nonlinear constants of an earth formation traversed by a borehole includes analyzing the flexural wave dispersions for dipole sources aligned parallel and perpendicular to the maximum far-field compressive stress direction together with the Stoneley wave dispersion derived from a monopole source. In the presence of formation and borehole stresses above and beyond those in an assumed isotropic reference state, the borehole flexural and Stoneley wave velocity dispersions are also functions of the formation stresses and nonlinear constants. A multi-frequency inversion of the flexural or Stoneley wave velocity dispersions over a selected frequency band is performed to determine the uniaxial stress magnitude S and the quantities ##EQU1## where c.sub.111, c.sub.112, and c.sub.123 are the formation non-linear constants.Type: GrantFiled: January 27, 1997Date of Patent: November 17, 1998Assignee: Schlumberger Technology CorporationInventor: Bikash K. Sinha
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Patent number: RE36012Abstract: Measurement-while-drilling apparatus includes a 14 MeV neutron accelerator, a near-spaced neutron detector which primarily senses source neutrons and whose output is proportional to source strength, one or more intermediately-spaced epithermal neutron detectors eccentered against the drill collar wall and primarily responsive to formation hydrogen concentration, and a third far-spaced radiation detector, either gamma ray or neutron, primarily responsive to formation density. The intermediately-spaced and far-spaced detector outputs, normalized by the near-spaced detector output, are combined to provide measurements of porosity, density and lithology and to detect gas. A thermal neutron detector and/or a gamma ray detector may also be provided at intermediate spacings to provide additional information of interest, such as standoff measurements and spectral analysis of formation composition. Tool outputs are related to the angular or azimuthal orientation of the measurement apparatus in the borehole.Type: GrantFiled: September 25, 1996Date of Patent: December 29, 1998Assignee: Schlumberger Technology CorporationInventors: William A. Loomis, Kenneth E. Stephenson, Jerome A. Truax, Wolfgang P. Ziegler, S. Zema Chowdhuri, Benoit Couet, Michael L. Evans, Paul Albats, Bradley A. Roscoe, Jacques M. Holenka, Keith A. Moriarty, William R. Sloan