Patents by Inventor T. Chang

T. Chang 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: 20190358018
    Abstract: A method for preparing a prosthetic valve and a delivery system for an implantation procedure. The method comprises (a) obtaining a tray, the tray containing the delivery system, the prosthetic valve coupled to the delivery system, and a valve cover in which the prosthetic valve is disposed. The tray comprises a storage cavity comprising an open end, a floor, and a peripheral side wall defining the depth of the cavity, wherein the prosthetic valve and the valve cover are disposed in the storage cavity; and a mounting surface that substantially immobilizes and maintains the valve cover and prosthetic valve within the storage cavity. The method further comprises (b) at least partially filing the storage cavity with a first hydrating fluid to completely immerse the prosthetic valve; and (c) removing the delivery device with the prosthetic valve from the tray, including disengaging the prosthetic valve from the mounting surface.
    Type: Application
    Filed: July 9, 2019
    Publication date: November 28, 2019
    Inventors: Vipul P. Rajpara, Darshin S. Patel, Michael R. Bialas, Brian R. Lowry, Russ Hunton, Arvin T. Chang
  • Patent number: 10476839
    Abstract: Systems and methods for triggering service activation include starting a vCPE instance in response to a request for a service, instantiating a service container for the requested service and starting the service in the service container, installing a fast path entry for the service container in a local bridge table, detecting an idle timeout of the service and labeling the local bridge table entry for the corresponding service container as inactive, notifying a cloud services manager that the service container is inactive, and removing the service container.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: November 12, 2019
    Assignee: Cisco Technology, Inc.
    Inventors: Muthumayan Madhayyan, Ganesh Sundaram, Chiajen Tsai, Larry T. Chang
  • Publication number: 20190315621
    Abstract: A device preferably for use in an inertial navigation system the device having a single IC wafer; a plurality of sensors bonded to bond regions on said single IC wafer, at least one of said bond regions including an opening therein in gaseous communication with a pressure chamber associated with at least one of the plurality of said sensors; and a plurality of caps encapsulating said plurality of sensors, at least one of said plurality of caps forming at least a portion of said pressure chamber. A method of making the device is also disclosed.
    Type: Application
    Filed: April 5, 2019
    Publication date: October 17, 2019
    Applicant: HRL Laboratories, LLC
    Inventors: Deborah J. KIRBY, Raviv PERAHIA, Hung NGUYEN, Frederic P. STRATTON, David T. CHANG
  • Patent number: 10444014
    Abstract: An angular sensor. The angular sensor includes a Coriolis vibratory gyroscope (CVG) resonator, configured to oscillate in a first pair of normal modes including a first normal mode and a second normal mode and a second pair of normal modes including a third normal mode and a fourth normal mode. The angular sensor further includes a coarse readout circuit configured to drive the first pair of modes, measure the motion of the first pair of modes, and derive from the measured motion of the first pair of modes a coarse measurement of an angular rate of the resonator. The angular sensor further includes and a fine readout circuit configured to derive a measurement of the difference between the true angular rate of the resonator and the coarse measurement.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: October 15, 2019
    Assignee: HRL Laboratories, LLC
    Inventors: Logan D. Sorenson, Raviv Perahia, David T. Chang, Randall L. Kubena, Deborah J. Kirby, Hung Nguyen, Richard J. Joyce
  • Patent number: 10436587
    Abstract: An angular sensor, comprising a Coriolis vibratory gyroscope (CVG) resonator, capable of oscillating along a first pair of normal n=1 modes comprising a first normal mode and a second normal mode; and a second pair of normal n=2 modes comprising a third normal mode and a fourth normal mode; the sensor further comprising one drive electrode and one sense electrode aligned along an anti-nodal axis of each mode; and a pair of bias tune electrodes aligned with an anti-nodal axis of each mode if no drive and sense electrode pair is aligned with said anti-nodal axis.
    Type: Grant
    Filed: June 8, 2018
    Date of Patent: October 8, 2019
    Assignee: HRL Laboratories, LLC
    Inventors: Logan D. Sorenson, Hung Nguyen, Raviv Perahia, Lian X. Huang, David T. Chang
  • Publication number: 20190305744
    Abstract: A method of making a SiC resonator includes forming a layer of an oxide material on a relatively thick wafer of SiC; bonding the layer of oxide material on the relatively thick wafer of SiC to a handle wafer having at least an oxide exterior surface, the resulting bond being substantially free of voids; planarizing the relatively thick wafer of SiC to a desired thickness; forming top and bottom electrodes on the wafer of SiC wafer to define a SiC wafer resonator portion; and forming a trench around the top and bottom electrodes, the tench completely penetrating the planarized wafer of SiC around a majority of a distance surrounding said top and bottom electrodes, except for one or more tether regions of the planarized wafer of SiC which remain physically coupled a remaining portion the SiC wafer resonator portion which defines a frame formed of the planarized wafer of SiC surrounding the SiC wafer resonator portion.
    Type: Application
    Filed: March 28, 2019
    Publication date: October 3, 2019
    Inventors: Raviv PERAHIA, Logan D. SORENSON, Lian X. HUANG, David T. CHANG, Makena S. WHITE, Jeremy BREGMAN
  • Patent number: 10398437
    Abstract: Implants or systems of implants and methods apply a selected force vector or a selected combination of force vectors within or across the left atrium, which allow mitral valve leaflets to better coapt. The implants or systems of implants and methods make possible rapid deployment, facile endovascular delivery, and full intra-atrial retrievability. The implants or systems of implants and methods also make use of strong fluoroscopic landmarks. The implants or systems of implants and methods make use of an adjustable implant and a fixed length implant. The implants or systems of implants and methods may also utilize a bridge stop to secure the implant, and the methods of implantation employ various tools.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: September 3, 2019
    Assignee: MVRx, Inc.
    Inventors: Timothy R. Machold, Robert T. Chang, David A. Rahdert, David Scott, David R. Tholfsen
  • Patent number: 10350047
    Abstract: A packaging system for storing a prosthetic valve and an elongated delivery system in a non-fluid environment. The packaging system includes a tray for securing both a prosthetic valve and an elongated delivery system. The tray includes a cavity sized and shaped to house a valve cover containing the prosthetic valve and at least part of the distal portion of the elongated delivery system. A mounting surface removably couples the valve cover to the cavity floor and to prevent the valve cover from moving. An engaging surface is disposed peripherally of the cavity and is elevated above the cavity floor. A ramp extends downwardly from the engaging surface and into the cavity through an opening defined in the peripheral side wall and adjacent the floor of the cavity. The engaging surface and ramp are configured to secure at least part of the elongated delivery system externally of the cavity.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: July 16, 2019
    Assignee: Edwards Lifesciences Corporation
    Inventors: Vipul P. Rajpara, Darshin S. Patel, Michael R. Bialas, Brian R. Lowry, Russ Hunton, Arvin T. Chang
  • Publication number: 20190183645
    Abstract: Anchors for securing an implant within a body organ and/or reshaping a body organ are provided herein. Anchors are configured for deployment in a body lumen or vasculature of the patient that are curved or conformable to accommodate anatomy of the patient. Such anchors can include deformable or collapsible structures upon tensioning of a bridging element in a lateral direction, or segmented tubes that can be adjusted by tightening of one or more tethers extending therethrough. Such anchors can be used as a posterior anchor in a blood vessel in implant systems having a tensioned bridging element extending between the posterior anchor and an anterior anchor deployed at another location within or along the body organ. Methods of deploying such anchors, and use of multiple anchors or multiple bridging elements to a single anchor are also provided.
    Type: Application
    Filed: February 25, 2019
    Publication date: June 20, 2019
    Applicant: MVRx, Inc.
    Inventors: Timothy R. Machold, David A. Rahdert, Robert T. Chang, Ganesh Manoharan
  • Publication number: 20190175343
    Abstract: Implants or systems of implants and methods apply a selected force vector or a selected combination of force vectors within or across the right atrium, which allow tricuspid valve leaflets to better coapt. The implants or systems of implants and methods make possible rapid deployment, facile endovascular delivery, and full intra-atrial retrievability. The implants or systems of implants and methods also make use of strong fluoroscopic landmarks. The implants or systems of implants and methods make use of an adjustable implant. The implants or systems of implants and methods may utilize a bridge stop to secure the implant.
    Type: Application
    Filed: December 5, 2018
    Publication date: June 13, 2019
    Inventors: Robert T. Chang, Timothy R. Machold, David A. Rahdert, Jason Rogers
  • Publication number: 20190169979
    Abstract: An instrument package for use during the drilling a wellbore. The instrument package includes a plurality of instruments such as accelerometers, gyroscopes, and magnetometers; a computer is configured to determine the current position of the plurality of instruments from a set of measurements produced by the plurality of instruments; and wherein the plurality of instruments are mechanically isolated from a drill head assembly by one or more multi-degree of freedom vibration isolators. The computer preferably has at least two modes different analytical modes of analyzing the set of measurements produced by the plurality of instruments, including a continuous mode and a survey mode, the continuous mode being operational during times that active drilling is occurring and the survey mode being operational during times that the active drilling is not occurring.
    Type: Application
    Filed: December 3, 2018
    Publication date: June 6, 2019
    Applicant: HRL Laboratories, LLC
    Inventors: Hung NGUYEN, Logan D. Sorenson, David L. Walter, Adour V. Kabakian, Raviv Perahia, Shuoqin Wang, David W. Shahan, Lian X. Huang, David T. Chang
  • Patent number: 10308505
    Abstract: A device preferably for use in an inertial navigation system the device having a single IC wafer; a plurality of sensors bonded to bond regions on said single IC wafer, at least one of said bond regions including an opening therein in gaseous communication with a pressure chamber associated with at least one of the plurality of said sensors; and a plurality of caps encapsulating said plurality of sensors, at least one of said plurality of caps forming at least a portion of said pressure chamber. A method of making the device is also disclosed.
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: June 4, 2019
    Assignee: HRL Laboratories, LLC
    Inventors: Deborah J. Kirby, Raviv Perahia, Hung Nguyen, Frederic P. Stratton, David T. Chang
  • Publication number: 20190144174
    Abstract: Single-dose vials for liquid solutions (e.g., liquid medicaments) can be designed to be used in conjunction with a medication regimen. A single-dose vial may include a removable member that prevents a liquid solution from escaping, but also allows an individual (e.g., a patient or a medical professional) to readily administer the liquid solution. A single-dose vial could include one or more discrete capsules that include the same or different liquid solutions. For example, multiple capsules could be arranged within a vial so that different liquid solutions are simultaneously or sequentially ejected following removal of the removable member and application of pressure to the multiple capsules (e.g., due to the individual squeezing the vial). Multiple vials can also be connected to one another in a strip configuration, which allows the individual to more easily adhere to a medication regimen that requires multiple doses over a period of time.
    Type: Application
    Filed: June 15, 2017
    Publication date: May 16, 2019
    Inventors: Robert T. Chang, Paolo De Marino, Manishi A. Desai
  • Patent number: 10278818
    Abstract: Anchors for securing an implant within a body organ and/or reshaping a body organ are provided herein. Anchors are configured for deployment in a body lumen or vasculature of the patient that are curved or conformable to accommodate anatomy of the patient. Such anchors can include deformable or collapsible structures upon tensioning of a bridging element in a lateral direction, or segmented tubes that can be adjusted by tightening of one or more tethers extending therethrough. Such anchors can be used as a posterior anchor in a blood vessel in implant systems having a tensioned bridging element extending between the posterior anchor and an anterior anchor deployed at another location within or along the body organ. Methods of deploying such anchors, and use of multiple anchors or multiple bridging elements to a single anchor are also provided.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: May 7, 2019
    Assignee: MVRx, Inc.
    Inventors: Timothy R. Machold, David A. Rahdert, Robert T. Chang, Ganesh Manoharan
  • Patent number: 10281277
    Abstract: A phononic travelling wave gyroscope. The gyroscope includes a phononic waveguide including at least one loop. The phase change incurred by phonons propagating around the loop is compared to a reference phase, and utilized to form an estimate of the rotational rate of the gyroscope.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: May 7, 2019
    Assignee: HRL Laboratories, LLC
    Inventors: Raviv Perahia, Logan D. Sorenson, Lian X. Huang, Hung Nguyen, David T. Chang, Deborah J. Kirby
  • Publication number: 20190072388
    Abstract: A resonant structure comprising at least two coaxial rings, wherein adjacent coaxial rings have adjacent peripheries and are attached together by a plurality of connection structures regularly arranged along said adjacent peripheries; and wherein a first ring has a first ring portion with a first radial thickness and a second ring, portion, in a vicinity of a first connection structure, with a second radial thickness smaller than said first radial thickness.
    Type: Application
    Filed: August 13, 2018
    Publication date: March 7, 2019
    Applicant: HRL Laboratories, LLC
    Inventors: Lian X. HUANG, Logan D. SORENSON, Chia-Ming "Gavin" CHANG, Raviv PERAHIA, Hung NGUYEN, David T. CHANG
  • Patent number: 10219902
    Abstract: Implants or systems of implants and methods apply a selected force vector or a selected combination of force vectors within or across the left atrium, which allow mitral valve leaflets to better coapt. The implants or systems of implants and methods make possible rapid deployment, facile endovascular delivery, and full intra-atrial adjustability and retrievability years after implant. The implants or systems of implants and methods also make use of strong fluoroscopic landmarks. The implants or systems of implants and methods make use of an adjustable implant and a fixed length implant. The implants or systems of implants and methods may also utilize an adjustable bridge stop to secure the implant, and the methods of implantation employ various tools.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: March 5, 2019
    Assignee: MVRx, Inc.
    Inventors: Timothy R. Machold, David J. Scott, David A. Rahdert, David R. Tholfsen, Robert T. Chang, John A. Macoviak
  • Patent number: 10219905
    Abstract: Implants or systems of implants and methods apply a selected force vector or a selected combination of force vectors within or across the left atrium, which allow mitral valve leaflets to better coapt. The implants or systems of implants and methods make possible rapid deployment, facile endovascular delivery, and full intra-atrial retrievability. The implants or systems of implants and methods also make use of strong fluoroscopic landmarks. The implants or systems of implants and methods make use of an adjustable implant and a fixed length implant. The implants or systems of implants and methods may also utilize a bridge stop to secure the implant, and the methods of implantation employ various tools.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: March 5, 2019
    Assignee: MVRx, Inc.
    Inventors: Robert T. Chang, John A. Macoviak, David A. Rahdert, Timothy R. Machold
  • Publication number: 20190057233
    Abstract: Improved tattoo recognition and improved individual recognition and tracking by directing energy onto an individual's tattoo or onto tissue proximate the individual's tattoo thereby producing a signal with enhanced information about the individual's tattoo. The signal with enhanced information about the individual's tattoo is used to match the individual with stored images in a tattoo database or databases. The signal with enhanced information about the individual's tattoo is combined with biometric systems to improve reliability and dependability of identifying, tracking, and/or monitoring individuals.
    Type: Application
    Filed: August 15, 2018
    Publication date: February 21, 2019
    Applicant: Lawrence Livermore National Security, LLC
    Inventors: Eddie E. Scott, Ronald J. Kane, John T. Chang
  • Publication number: 20190049246
    Abstract: An angular sensor, comprising a Coriolis vibratory gyroscope (CVG) resonator, capable of oscillating along a first pair of normal n=1 modes comprising a first normal mode and a second normal mode; and a second pair of normal n=2 modes comprising a third normal mode and a fourth normal mode; the sensor further comprising one drive electrode and one sense electrode aligned along an anti-nodal axis of each mode; and a pair of bias tune electrodes aligned with an anti-nodal axis of each mode if no drive and sense electrode pair is aligned with said anti-nodal axis.
    Type: Application
    Filed: June 8, 2018
    Publication date: February 14, 2019
    Applicant: HRL Laboratories, LLC
    Inventors: Logan D. SORENSON, Hung Nguyen, Raviv PERAHIA, Lian X. Huang, David T. CHANG