Patents by Inventor Steven Alexander

Steven Alexander 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: 10476972
    Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for presence determination. One of the methods includes for one or more user devices having one or more associated users, determining a current location of a user, wherein the current location is associated with a particular space of a plurality of different spaces, wherein the determining includes: computing a plurality of location results, wherein each location result is computed using a distinct process of a plurality of processes; and evaluating the plurality of location results to determine a current space of the user; wherein the determining is performed by one or more of, a particular user device, a terminal device, or a server system.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: November 12, 2019
    Assignee: Google LLC
    Inventors: Taylor Keith Umphreys, Siddhant Bhargava, Benjamin Jerming Chang, Brian Keith Hales, Steven Alexander Hales, Craig Thomas Rohe, Thomas Joseph Gurka
  • Patent number: 10376881
    Abstract: The present invention relates to a microfluidic based assay system, comprising a disposable assay cartridge and associated reading device, as well as the individual components themselves. The present invention also relates to methods of conducting assays, using the cartridge and device of the invention, as well as kits for conducting assays.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: August 13, 2019
    Assignee: LumiraDx UK Ltd.
    Inventors: Phillip Lowe, Steven Alexander Keatch, Brian McGuigan
  • Publication number: 20190160460
    Abstract: The present invention relates to a microfluidic assay system and associated reading device, as well as the individual components themselves. The present invention also relates to methods of conducting assays, using a disposable system and associated reading device, as well as kits for conducting assays.
    Type: Application
    Filed: June 30, 2017
    Publication date: May 30, 2019
    Applicant: LumiraDx UK Ltd.
    Inventors: Steven Alexander Keatch, Phil Lowe, Brian McGuigan, Andrew Peter Phelan, Aman Khan
  • Patent number: 10261077
    Abstract: A subtractive corrective assay device and methodology, whereby ail required binding and label detection reagents are initially located within the detection zone. Application of a magnetic field is used to selectively remove bound label from the detection zone by means of paramagnetic particles. The relationship between measured label concentration before and after the application of a magnetic field within the detection zone is used to accurately measure analyte concentration within the sample.
    Type: Grant
    Filed: May 16, 2016
    Date of Patent: April 16, 2019
    Assignee: LUMIRADX UK LTD
    Inventors: Phillip Lowe, Steven Alexander Keatch, Brian McGuigan
  • Patent number: 10263571
    Abstract: An RF PA and an RF PA protection circuit are disclosed according to one embodiment of the present disclosure. The RF PA includes an RF PA bias circuit and an RF PA transistor element. The RF PA transistor element has a first current terminal and a control terminal. The RF PA protection circuit is coupled between the RF PA bias circuit and the first current terminal. The RF PA protection circuit reduces a current through the first current terminal using the RF PA bias circuit when a magnitude of a voltage at the first current terminal exceeds a protection threshold.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: April 16, 2019
    Assignee: Qorvo US, Inc.
    Inventors: Hailin Han, Steven Alexander Brown, Christopher Robert Moll, Stephen P. Bachhuber, Robert Edwin Knapp
  • Publication number: 20190060914
    Abstract: A rotor bowl for use in a centrifugal concentrator for separating particulate material of higher specific gravity from a liquid slurry comprising a liquid and particulate material of different specific gravities, wherein the inner surface of the rotor bowl has an outwardly inclined migration surface and a capture zone above the migration surface, wherein the capture zone has a generally vertical annular wall located radially outwardly of the migration zone, and the generally vertical annular wall has a vibratory surface adapted to be selectively vibrated to thereby stratify particulate material or slurry located in contact with or adjacent to the vibratory surface within the capture zone to thereby permit the heavier concentrate to accumulate in the area closest to the wall of the capture zone. The vibratory surface may be the continuous inner liner of the capture zone, or separate vibrating surfaces may be provided on the surface of the inner liner in the capture zone.
    Type: Application
    Filed: February 24, 2017
    Publication date: February 28, 2019
    Inventors: Steven Alexander MCALISTER, Jonas Hendrik BOEHNKE
  • Publication number: 20190060797
    Abstract: Methods and apparatus for liquid/solid separation for use in applications such as dewatering fine particulate solids, and recovery of valuable metals from ore in a leaching process are provided. One application relates to methods of agitation leaching of metals such as gold from gold-bearing feedstock. A slurry is formed in a tank by agitation, and allowed to settle. A filter bed forms to drain the liquid from the tank, and a vertical screen pipe such as a well point addresses the formation of an impervious film on the upper surface of the filter bed.
    Type: Application
    Filed: October 31, 2018
    Publication date: February 28, 2019
    Inventors: Steven Alexander McAlister, Mark Donald Van Kleek, Michael Charles Jillings, Brennan James Mallory, Mark Henry Vinchoff
  • Patent number: 10143943
    Abstract: Methods and apparatus for liquid/solid separation for use in applications such as dewatering fine particulate solids, and recovery of valuable metals from ore in a leaching process are provided. One application relates to methods of agitation leaching of metals such as gold from gold-bearing feedstock. A slurry is formed in a tank by agitation, and allowed to settle. A filter bed forms to drain the liquid from the tank, and a vertical screen pipe such as a well point addresses the formation of an impervious film on the upper surface of the filter bed.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: December 4, 2018
    Assignee: Sepro Mineral Systems Corp.
    Inventors: Steven Alexander McAlister, Mark Donald Van Kleek, Michael Charles Jillings, Brennan James Mallory, Mark Henry Vinchoff
  • Publication number: 20180291033
    Abstract: Embodiments of the present invention are directed to methods and dosage forms for treating inflammation and rejection in transplantation injuries with Bryostatin-1, Bryostatin-1 analogs and pharmaceutically acceptable salts thereof.
    Type: Application
    Filed: June 8, 2018
    Publication date: October 11, 2018
    Inventors: Jonathan Steven Alexander, April C. Carpenter, Trevor Percival Castor
  • Patent number: 10069928
    Abstract: Client applications that use an open session connection on a unidirectional communication channel, including a plurality of requests, can have such requests aggregated and transformed into individual requests for transmission over a bidirectional communication channel. In at least one embodiment of a proxy disclosed herein, an RPC stream is transformed into multiple individual HTTP requests. By using individual HTTP requests, such requests can be handled easily by existing HTTP infrastructure, such as proxies and HTTP servers. In another embodiment, a plurality of RPC requests can be embedded within an individual HTTP request so as to ensure that the RPC requests are not modified.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: September 4, 2018
    Assignee: Amazon Technologies, Inc.
    Inventors: Steven Alexander Hardy, Mark Swaanenburg, Enrico Huijbers
  • Patent number: 9994585
    Abstract: Embodiments of the present invention are directed to methods and dosage forms for treating inflammation and rejection in transplantation injuries with Bryostatin-1, Bryostatin-1 analogs and pharmaceutically acceptable salts thereof.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: June 12, 2018
    Assignee: Aphios Corporation
    Inventors: Jonathan Steven Alexander, April C. Carpenter, Trevor Percival Castor
  • Publication number: 20180124109
    Abstract: The present disclosure generally relates to web page analysis, and more particularly to a classification system for web pages. The classification system may classify a web page as malicious based upon one or more signatures generated for the web page. For example, the classification system may compare one or more signatures generated for a first web page to one or more signatures generated for a second web page, where the first web page and the second web page are the same web page at different times or different web pages. Based upon a similarity of the signatures, the classification system may output whether the first web page is malicious. For another example, the classification system may include a classification model that is trained based upon one or more signatures for one or more classified web pages. The classification model may output whether the web page is malicious.
    Type: Application
    Filed: November 1, 2017
    Publication date: May 3, 2018
    Applicant: RiskIQ, Inc.
    Inventors: Adam Hunt, Joseph Linn, Elias Manousos, Chris Kiernan, David Pon, Jonas Edgeworth, Steven Alexander Daniel Pon
  • Publication number: 20180059105
    Abstract: An assay method and device can perform at least one (e.g., at least two) assays on a single aliquot of a sample liquid. The device can mix a sample liquid with assay reagents including magnetically susceptible particles. The device is configured to create a sample liquid-air interface with the sample liquid. The magnetically susceptible particles can be located (via an applied magnetic field) at the liquid-air interface when a second liquid contacts the interface to form a liquid-liquid interface. The magnetic particles travel across the liquid-liquid interface to the second liquid. The magnetically susceptible particles are configured to trans-port an analyte across the interface into the second liquid. An assay for the analyte is performed in the second liquid. An assay for another analyte can also be performed in the sample liquid.
    Type: Application
    Filed: February 27, 2017
    Publication date: March 1, 2018
    Applicant: INVERNESS MEDICAL SWITZERLAND GMBH
    Inventors: Phillip Lowe, Steven Alexander Keatch, Steven Howell, Claus Marquordt, Ruth Polwart, Alan Kenneth Thomson
  • Publication number: 20180013392
    Abstract: An RF PA and an RF PA protection circuit are disclosed according to one embodiment of the present disclosure. The RF PA includes an RF PA bias circuit and an RF PA transistor element. The RF PA transistor element has a first current terminal and a control terminal. The RF PA protection circuit is coupled between the RF PA bias circuit and the first current terminal. The RF PA protection circuit reduces a current through the first current terminal using the RF PA bias circuit when a magnitude of a voltage at the first current terminal exceeds a protection threshold.
    Type: Application
    Filed: July 7, 2017
    Publication date: January 11, 2018
    Inventors: Hailin Han, Steven Alexander Brown, Christopher Robert Moll, Stephen P. Bachhuber, Robert Edwin Knapp
  • Patent number: 9858301
    Abstract: In one embodiment, entries in a database journal in a non-interactive mode can be partially flushed to maintain database performance. In particular, data records that require decryption prior to flushing a database journal entry can be bypassed in non-interactive mode, while data records that need not be decrypted can be flushed. For example, entries that relate to a creation or deletion of a data record can be performed, while entries relating to modification of an existing record can be bypassed and processed during an interactive mode of operation. Other embodiments also include a transformation of the database journal using a filter so that multiple entries to a same record can be combined.
    Type: Grant
    Filed: January 20, 2015
    Date of Patent: January 2, 2018
    Assignee: Amazon Technologies, Inc.
    Inventors: Steven Alexander Hardy, Mark Swaanenburg
  • Patent number: 9838482
    Abstract: In one embodiment, a system uses a two-layer deterministic function, such as a hashing mechanism, to ensure session stickiness or affinity. A client can generate a session key that can be used for at least two things. First, a load balancer can be selected by the client using the session key by using a consistent or deterministic hashing algorithm so that the same load balancer is selected from a set of weighted load balancers. After selecting the load balancer, the client can send the request to the selected load balancer. The load balancer then uses the same session key, which can be transmitted in an HTTP header, to select a backend host server computer. The result is that session affinity is maintained.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: December 5, 2017
    Assignee: Amazon Technologies, Inc.
    Inventors: Steven Alexander Hardy, Markus Petrus Giuseppe Sartor, Mark Swaanenburg, Isaac Alon Salpeter
  • Patent number: 9678509
    Abstract: Techniques that optimize performance of simultaneous localization and mapping (SLAM) processes for mobile devices, typically a mobile robot. In one embodiment, erroneous particles are introduced to the particle filtering process of localization. Monitoring the weights of the erroneous particles relative to the particles maintained for SLAM provides a verification that the robot is localized and detection that it is no longer localized. In another embodiment, cell-based grid mapping of a mobile robot's environment also monitors cells for changes in their probability of occupancy. Cells with a changing occupancy probability are marked as dynamic and updating of such cells to the map is suspended or modified until their individual occupancy probabilities have stabilized.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: June 13, 2017
    Assignee: Neato Robotics, Inc.
    Inventors: Boris Sofman, Vladimir Ermakov, Mark Emmerich, Steven Alexander, Nathaniel David Monson
  • Patent number: 9675317
    Abstract: A medical imaging data processing apparatus for identifying an interface between anatomical features comprises a receiving unit configured to receive first medical imaging data that represents a region of a subject at a first time, and second medical imaging data that represents the region of the subject at a second, later time, a registration unit configured to perform a registration procedure to obtain registration data representative of a registration between the first medical imaging data and the second medical imaging data, and an interface identification unit configured to determine a variation of the registration data with location and to identify an interface between an anatomical feature and at least one further anatomical feature based on said variation of the registration data with location.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: June 13, 2017
    Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATION
    Inventor: Steven Alexander Reynolds
  • Patent number: 9618506
    Abstract: An assay method and device can perform at least one (e.g., at least two) assays on a single aliquot of a sample liquid. The device can mix a sample liquid with assay reagents including magnetically susceptible particles. The device is configured to create a sample liquid-air interface with the sample liquid. The magnetically susceptible particles can be located (via an applied magnetic field) at the liquid-air interface when a second liquid contacts the interface to form a liquid-liquid interface. The magnetic particles travel across the liquid-liquid interface to the second liquid. The magnetically susceptible particles are configured to transport an analyte across the interface into the second liquid. An assay for the analyte is performed in the second liquid. An assay for another analyte can also be performed in the sample liquid.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: April 11, 2017
    Assignee: INVERNESS MEDICAL SWITZERLAND GMBH
    Inventors: Phillip Lowe, Steven Alexander Keatch, Steven Howell, Claus Marquordt, Ruth Polwart, Alan Kenneth Thomson
  • Patent number: 9530596
    Abstract: Disclosed is a switching apparatus for an electrical appliance where the switching apparatus includes a plurality of electric switches connected to the electrical appliance. Each electric switch is configured to switch ON/OFF the electrical appliance. A plurality of interconnected ON solenoid devices and a plurality of interconnected OFF solenoid devices are electro-magnetically coupled to ON terminals and OFF terminals of the plurality of electric switches, respectively. Upon flipping an electric switch to an ON operating position a respective OFF solenoid device coupled to the electric switch is de-activated causing de-activation of remaining OFF solenoid devices thereby electro-magnetically flipping remaining electric switches to respective ON operating positions.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: December 27, 2016
    Inventor: Steven Alexander Linton