Patents by Inventor Majid Sarrafzadeh
Majid Sarrafzadeh 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).
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Patent number: 9891701Abstract: A location of a sensor is determined by: (1) receiving time series data including components in a plurality of dimensions, wherein the time series data correspond to measurements of the sensor that is applied to a subject; (2) determining a plurality of subsequences associated with the time series data, wherein each of the plurality of subsequences represents a characteristic pattern projected along one of the plurality of dimensions; (3) identifying a correlated subset of the plurality of subsequences as at least one instance of an activity of the subject; and (4) based on features of the correlated subset, determining the location of the sensor as applied to the subject.Type: GrantFiled: March 2, 2012Date of Patent: February 13, 2018Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Majid Sarrafzadeh, Ani Nahapetian, Alireza Vahdatpour, Mahsan Rofouei
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Patent number: 9833196Abstract: Activities and abnormalities in activities are detected by: (1) receiving data corresponding to measurements of an activity occurring during a time interval; (2) determining a plurality of primitives associated with the data, wherein each of the plurality of primitives represents a characteristic pattern in a portion of the time interval; (3) derive an activity structure relating a first subset of the plurality of primitives that are correlated in time; and (4) based on the activity structure, classify a second subset of the plurality of primitives as an abnormal instance of the bodily activity.Type: GrantFiled: March 1, 2012Date of Patent: December 5, 2017Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Majid Sarrafzadeh, Alireza Vahdatpour
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Publication number: 20170332917Abstract: A method of sleep apnea diagnosis includes providing interrogatories at a user interface; receiving responses to the interrogatories at the user interface; receiving blood pressure measurement information from a blood pressure monitoring device; receiving heart rate measurement information from a heart rate monitoring device; and determining, from the responses to the interrogatories, the blood pressure measurement information and the heart rate measurement information, a classification of a subject, the classification being either having sleep apnea disorder or not having sleep apnea disorder.Type: ApplicationFiled: May 19, 2017Publication date: November 23, 2017Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Majid Sarrafzadeh, Lauren E. Samy
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Publication number: 20170319096Abstract: Systems and methods are disclosed that use wireless coupling of energy for operation of both external and internal devices, including external sensor arrays and implantable devices. The signals conveyed may be electronic, optical, acoustic, biomechanical, and others to provide in situ sensing and monitoring of internal anatomies and implants using a wireless, biocompatible electromagnetic powered sensor systems.Type: ApplicationFiled: May 22, 2017Publication date: November 9, 2017Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: William J. Kaiser, Majid Sarrafzadeh, Denise Aberle, Maxim Batalin, Alireza Mehrnia, Ani Nahapetian
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Patent number: 9754081Abstract: A method includes receiving contextual data related to at least one of environmental, physiological, behavioral, and historical context, and receiving outcome data related to at least one outcome. The method further includes creating a feature set from the contextual data, selecting a subset of features from the feature set, assigning a score to each feature in the subset of features according to the probability that the feature is a predictor of the at least one outcome, and generating a characteristic curve for the at least one outcome from the subset of features, the characteristic curve being based on the scoring. The method further includes calculating the area under the characteristic curve, and using, the area under the characteristic curve, identifying whether the subset of features is a suitable predictor for the at least one outcome.Type: GrantFiled: May 13, 2014Date of Patent: September 5, 2017Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Hassan Ghasemzadeh, Myung-Kyung Suh, Mars Lan, Majid Sarrafzadeh, Nabil Alshurafa
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Publication number: 20170224261Abstract: A compact perfusion scanner and method of characterizing tissue health status are disclosed that incorporate pressure sensing components in conjunction with the optical sensors to monitor the level of applied pressure on target tissue for precise skin/tissue blood perfusion measurements and oximetry. The systems and methods allow perfusion imaging and perfusion mapping (geometric and temporal), signal processing and pattern recognition, noise cancelling and data fusion of perfusion data, scanner position and pressure readings.Type: ApplicationFiled: February 21, 2017Publication date: August 10, 2017Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Majid Sarrafzadeh, William Kaiser, Barbara Bates-Jensen, Alireza Mehrnia, Bijan Mapar, Frank Wang
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Patent number: 9659044Abstract: A saliency function is computed to indicate the saliency of each of a plurality of data points in a dataset. For each local maximum in the saliency function, a segment of the dataset is inserted into an index.Type: GrantFiled: July 19, 2012Date of Patent: May 23, 2017Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Majid Sarrafzadeh, Jonathan S. Woodbridge
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Publication number: 20160220172Abstract: A handheld, conforming capacitive sensing apparatus configured to measure Sub-Epidermal Moisture (SEM) as a mean to detect and monitor the formation of pressure ulcers. The device incorporates an array of electrodes which are excited to measure and scan SEM in a programmable and multiplexed manner by a battery-less RF-powered chip. The scanning operation is initiated by an interrogator which excites a coil embedded in the apparatus and provides the needed energy burst to support the scanning/reading operation. Each electrode measures the equivalent sub-epidermal capacitance corresponding and representing the moisture content.Type: ApplicationFiled: April 9, 2016Publication date: August 4, 2016Applicants: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, BRUIN BIOMETRICS, LLCInventors: Majid Sarrafzadeh, William Kaiser, Alireza Mehrnia, Barbara M. Bates-Jensen, Frank Wang, Michael Flesch, Joseph Boystak, Yeung Lam
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Patent number: 9398879Abstract: A handheld, conforming capacitive sensing apparatus configured to measure Sub-Epidermal Moisture (SEM) as a mean to detect and monitor the formation of pressure ulcers. The device incorporates an array of electrodes which are excited to measure and scan SEM in a programmable and multiplexed manner by a battery-less RF-powered chip. The scanning operation is initiated by an interrogator which excites a coil embedded in the apparatus and provides the needed energy burst to support the scanning/reading operation. Each electrode measures the equivalent sub-epidermal capacitance corresponding and representing the moisture content.Type: GrantFiled: August 17, 2015Date of Patent: July 26, 2016Assignees: The Regents of the University of California, Bruin Biometrics, LLCInventors: Majid Sarrafzadeh, William Kaiser, Alireza Mehrnia, Barbara M. Bates-Jensen, Frank Wang, Michael Flesch, Joseph Boystak, Yeung Lam
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Publication number: 20160174871Abstract: A handheld, conforming capacitive sensing apparatus configured to measure Sub-Epidermal Moisture (SEM) as a mean to detect and monitor the formation of pressure ulcers. The device incorporates an array of electrodes which are excited to measure and scan SEM in a programmable and multiplexed manner by a battery-less RF-powered chip. The scanning operation is initiated by an interrogator which excites a coil embedded in the apparatus and provides the needed energy burst to support the scanning/reading operation. Each electrode measures the equivalent sub-epidermal capacitance corresponding and representing the moisture content.Type: ApplicationFiled: March 2, 2016Publication date: June 23, 2016Applicants: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, BRUIN BIOMETRICS, LLCInventors: Majid Sarrafzadeh, William Kaiser, Alireza Mehrnia, Barbara M. Bates-Jensen, Frank Wang, Michael Flesch, Joseph Boystak, Yeung Lam
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Publication number: 20160148103Abstract: A system includes an interface configured to receive time series data representing information from a plurality of sensors, and a processor configured to construct a behavior model based on the time series data. The processor identifies features in the time series data, divides the time series data of each of the identified features into segments, and extracts feature components from the segments. The processor further constructs a plurality of state graphs, each state graph including components connected by weighted edges, constructs a behavior graph, wherein the state graphs form vertices of the behavior graph, clusters the state graphs in the behavior graph; and selects a representative state graph from each cluster, wherein the behavior model includes the selected state graphs.Type: ApplicationFiled: November 23, 2015Publication date: May 26, 2016Inventors: Majid Sarrafzadeh, Foad Dabiri, Hyduke Noshadi
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Publication number: 20160135744Abstract: A fabric-based pressure sensor array includes: (1) a first layer including M elongated conductive strips coated thereon; (2) a second layer including N elongated conductive strips coated thereon, the M elongated conductive strips extending crosswise relative to the N elongated conductive strips to define M×N intersections; and (3) a unitary textile sheet extending between the first layer and the second layer so as to overlap the M×N intersections, the textile sheet having a variable resistivity in response to applied pressure so as to define M×N pressure sensors at locations corresponding to the M×N intersections.Type: ApplicationFiled: January 20, 2016Publication date: May 19, 2016Inventors: Majid Sarrafzadeh, Wenyao Xu, Ming-Chun Huang, Nitin Raut, Behrooz Yadegar
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Patent number: 9330342Abstract: A system includes a pressure sensitive material that provides an indication of applied pressure for multiple locations on the material, and an analysis device in communication with the pressure sensitive material. The analysis device receives the indication of applied pressure, determines, for each of multiple measurement periods, a pressure image from the indication of applied pressure such that a sequence of pressure images is determined, and constructs a manifold representing the sequence of pressure images.Type: GrantFiled: December 10, 2013Date of Patent: May 3, 2016Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Majid Sarrafzadeh, Wenyao Xu, Ming-Chun Huang, Jason J. Liu
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Patent number: 9271665Abstract: A fabric-based pressure sensor array includes: (1) a first layer including M elongated conductive strips coated thereon; (2) a second layer including N elongated conductive strips coated thereon, the M elongated conductive strips extending crosswise relative to the N elongated conductive strips to define M×N intersections; and (3) a unitary textile sheet extending between the first layer and the second layer so as to overlap the M×N intersections, the textile sheet having a variable resistivity in response to applied pressure so as to define M×N pressure sensors at locations corresponding to the M×N intersections.Type: GrantFiled: May 18, 2012Date of Patent: March 1, 2016Assignees: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, MEDISENS WIRELESS, INC.Inventors: Majid Sarrafzadeh, Wenyao Xu, Ming-Chun Huang, Nitin Raut, Behrooz Yadegar
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Publication number: 20160026767Abstract: An apparatus includes a sensor configured to detect a variable characteristic, the variation of the characteristic including variation indicative of an individual swallowing when the sensor is positioned in a neck area of the individual. The apparatus includes a wireless data communication interface configured to receive information related to the characteristic and transmit the information externally. The sensor may be, for example, an acoustic sensor, a piezoelectric sensor, a capacitive sensor, or a pressure sensor. The apparatus may include a sensor interface to sample a signal from the sensor and provide data related to the signal for transmission externally. A system may use the information related to the characteristic to identify eating habits and type of food eaten. Feedback may be provided to the individual to help the individual change their dietary intake and habits.Type: ApplicationFiled: March 12, 2014Publication date: January 28, 2016Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Majid Sarrafzadeh, Misagh Falahi, Nabil Alshurafa, Suneil Nyamathi, Haik Kalantarian, Adam Ryan Traidman
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Patent number: 9220455Abstract: A handheld, conforming capacitive sensing apparatus configured to measure Sub-Epidermal Moisture (SEM) as a mean to detect and monitor the formation of pressure ulcers. The device incorporates an array of electrodes which are excited to measure and scan SEM in a programmable and multiplexed manner by a battery-less RF-powered chip. The scanning operation is initiated by an interrogator which excites a coil embedded in the apparatus and provides the needed energy burst to support the scanning/reading operation. Each electrode measures the equivalent sub-epidermal capacitance corresponding and representing the moisture content.Type: GrantFiled: June 6, 2014Date of Patent: December 29, 2015Assignees: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, BRUIN BIOMETRICS, LLCInventors: Majid Sarrafzadeh, William Kaiser, Alireza Mehrnia, Barbara M. Bates-Jensen, Frank Wang, Michael Flesch, Joseph Boystak, Yeung Lam
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Publication number: 20150366499Abstract: A handheld, conforming capacitive sensing apparatus configured to measure Sub-Epidermal Moisture (SEM) as a mean to detect and monitor the formation of pressure ulcers. The device incorporates an array of electrodes which are excited to measure and scan SEM in a programmable and multiplexed manner by a battery-less RF-powered chip. The scanning operation is initiated by an interrogator which excites a coil embedded in the apparatus and provides the needed energy burst to support the scanning/reading operation. Each electrode measures the equivalent sub-epidermal capacitance corresponding and representing the moisture content.Type: ApplicationFiled: August 17, 2015Publication date: December 24, 2015Applicants: BRUIN BIOMETRICS, LLC, THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Majid Sarrafzadeh, William Kaiser, Alireza Mehrnia, Barbara M. Bates-Jensen, Frank Wang, Michael Flesch, Joseph Boystak, Yeung Lam
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Publication number: 20150257712Abstract: Systems and methods for generalized precursor pattern discovery that work with a wide range of biomedical signals and applications to detect a wide range of medical events are disclosed. In some embodiments, the methods and systems do not require domain-specific knowledge or significant reconfiguration based on the medical event being analyzed, hence it is also possible to discover patterns previously unknown to experts. In some embodiments, to build precursor pattern detection models, the system obtains annotated monitoring data. Positive and negative segments are extracted from the annotated monitoring data, and are preprocessed. Features are extracted from the preprocessed segments, and selected features are chosen from the extracted features. The selected features are classified to create the precursor pattern detection model The precursor pattern detection model may then be used in real time to detect occurrences of the medical event of interest.Type: ApplicationFiled: August 28, 2013Publication date: September 17, 2015Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Majid Sarrafzadeh, Myung-Kyung Suh, Mars Lan, Hassan Ghasemzadeh
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Publication number: 20150234997Abstract: Systems, methods, and devices are disclosed that monitor the health status of patients. Dynamic task management functions apply data analytics to discretize continuous data values from monitored patients, and apply association rule mining techniques to prioritized required user tasks. Embodiments of the present disclosure minimize the number of daily action items required by patients. The remaining action items maximize information gain, thereby improving the overall level of patient adherence and satisfaction without losing health monitoring effectiveness.Type: ApplicationFiled: August 27, 2013Publication date: August 20, 2015Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Majid Sarrafzadeh, Myung-Kyung Suh, Mars Lan, Hassan Ghasemzadeh
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Publication number: 20150133206Abstract: An exercise gaming system includes a motion-detect device including a plurality of sensors configured to monitor movement of the motion-detect device during a user motion, and a first processor configured to receive input data from the plurality of sensors and provide information related to the data for transmission via a first wireless communication interface. The exercise gaming system further includes a computing device including a second wireless communication interface configured to receive information transmitted from the motion-detect device, a second processor configured to compare the received information to data stored in a memory and identify the user motion as a predefined movement, and a display configured to visually provide feedback related to the identified predefined movement.Type: ApplicationFiled: March 8, 2013Publication date: May 14, 2015Inventors: Majid Sarrafzadeh, Sunghoon Ivan Lee, Jack Bobak Mortazavi