Patents by Inventor William J. Mitchell

William J. Mitchell 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: 20190160222
    Abstract: Restenosis or neointimal formation may occur following angioplasty or other trauma to an artery such as by-pass surgery. This presents a major clinical problem which narrows the artery. The invention provides a balloon catheter with a particular electrode configuration. Also provided is a method whereby vascular cells in the area of the artery subjected to the trauma are subjected to irreversible electroporation which is a non-thermal, non-pharmaceutical method of applying electrical pulses to the cells so that substantially all of the cells in the area are ablated while leaving the structure of the vessel in place and substantially unharmed due to the non-thermal nature of the procedure.
    Type: Application
    Filed: May 24, 2018
    Publication date: May 30, 2019
    Applicants: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, ANGIODYNAMICS, INC.
    Inventors: BORIS RUBINSKY, ELAD MAOR, ANTONI IVORRA, JAMES J. MITCHELL, WILLIAM C. HAMILTON
  • Publication number: 20180064872
    Abstract: Devices, systems, and techniques for programming drug delivery are described. Such techniques may account for diffusion and mixing of drug within the fluid or allow for more flexible programming options. In one example, a method may include determining one or more fluid delivery parameters (e.g., volume, flow rate, or period of time) for a fluid that is a mixture of two other fluids. The determination may be based on one or more fluid delivery parameters of the two other fluids and/or a concentration profile representing the mixing between the two other fluids. In other examples, drug delivery programming may be facilitated by the selection of various patterns and steps of drug delivery. The system may track volume of delivered fluid to maintain desired dosing of the patient.
    Type: Application
    Filed: November 13, 2017
    Publication date: March 8, 2018
    Inventors: Irfan Z. Ali, Prasanna Anbazhagan, William J. Mitchell, Earle T. Roberts, Touby A. Drew
  • Patent number: 9814834
    Abstract: Devices, systems, and techniques for programming drug delivery are described. Such techniques may account for diffusion and mixing of drug within the fluid or allow for more flexible programming options. In one example, a method may include determining one or more fluid delivery parameters (e.g., volume, flow rate, or period of time) for a fluid that is a mixture of two other fluids. The determination may be based on one or more fluid delivery parameters of the two other fluids and/or a concentration profile representing the mixing between the two other fluids. In other examples, drug delivery programming may be facilitated by the selection of various patterns and steps of drug delivery. The system may track volume of delivered fluid to maintain desired dosing of the patient.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: November 14, 2017
    Assignee: Medtronic, Inc.
    Inventors: Irfan Z. Ali, Prasanna Anbazhagan, William J. Mitchell, Earle T. Roberts, Touby A. Drew
  • Patent number: 9401894
    Abstract: Systems, devices and methods employing coded magnetic fields or transfer of encryption key information via proximity telemetry are described. The systems, methods and devices help prevent or reduce unintended or unintentional distance telemetry communication between an external medical device and an implantable medical device.
    Type: Grant
    Filed: February 3, 2014
    Date of Patent: July 26, 2016
    Assignee: MEDTRONIC, INC.
    Inventors: Scott L. Kalpin, Patrick S. Leong, Scott A. Sarkinen, Earle T. Roberts, William J. Mitchell
  • Publication number: 20150133888
    Abstract: Devices, systems, and techniques for programming drug delivery are described. Such techniques may account for diffusion and mixing of drug within the fluid or allow for more flexible programming options. In one example, a method may include determining one or more fluid delivery parameters (e.g., volume, flow rate, or period of time) for a fluid that is a mixture of two other fluids. The determination may be based on one or more fluid delivery parameters of the two other fluids and/or a concentration profile representing the mixing between the two other fluids. In other examples, drug delivery programming may be facilitated by the selection of various patterns and steps of drug delivery. The system may track volume of delivered fluid to maintain desired dosing of the patient.
    Type: Application
    Filed: November 10, 2014
    Publication date: May 14, 2015
    Inventors: Irfan Z. Ali, Prasanna Anbazhagan, William J. Mitchell, Earle T. Roberts, Touby A. Drew
  • Patent number: 8757309
    Abstract: An autonomous modular wheel assembly includes at least one connector for connecting the wheel control assembly to a vehicle axle, one or more suspension arms that support the assembly with respect to the axle, an electric drive motor connected to a the vehicle wheel, a steering bearing, and a steering actuator. The electric drive motor and steering bearing control the operation of the vehicle wheel in response to commands received via the actuator. The connector has one or more electrical connection points for providing power and information to the wheel assembly. The robot wheel increases the vehicle steering range to up to 150 degrees and enables new vehicle drive modes. The traditional +/?30 degrees of front wheel steering are enabled, as well as at least three new drive modes: four wheel parallel and converse steering, spin on spot steering, and 90 degree sideways motion.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: June 24, 2014
    Assignee: Massachusetts Institute of Technology
    Inventors: Peter Alfons Schmitt, William J. Mitchell
  • Publication number: 20140153719
    Abstract: Systems, devices and methods employing coded magnetic fields or transfer of encryption key information via proximity telemetry are described. The systems, methods and devices help prevent or reduce unintended or unintentional distance telemetry communication between an external medical device and an implantable medical device.
    Type: Application
    Filed: February 3, 2014
    Publication date: June 5, 2014
    Applicant: MEDTRONIC, INC.
    Inventors: Scott L. Kalpin, Patrick S. Leong, Scott A. Sarkinen, Earle T. Roberts, William J. Mitchell
  • Patent number: 8682437
    Abstract: Systems, devices and methods employing coded magnetic fields or transfer of encryption key information via proximity telemetry are described. The systems, methods and devices help prevent or reduce unintended or unintentional distance telemetry communication between an external medical device and an implantable medical device.
    Type: Grant
    Filed: April 24, 2008
    Date of Patent: March 25, 2014
    Assignee: Medtronic, Inc.
    Inventors: Scott L. Kalpin, Patrick S. Leong, Scott A. Sarkinen, Earle T. Roberts, William J. Mitchell
  • Patent number: 8535280
    Abstract: The present invention includes systems and methods for detecting fluid flow into or out of a port chamber or a reservoir of an implantable medical device utilizing a pressure sensor. The system detects characteristic pressure profiles associated with fluid flowing into the medical device, out of the medical device, and also whether one or both of the port chamber or reservoir are substantially empty or substantially full. In addition, the present invention may generate a sensory cue to a clinician to indicate the fluid status.
    Type: Grant
    Filed: August 27, 2008
    Date of Patent: September 17, 2013
    Assignee: Medtronic, In
    Inventors: Charles Randall Rogers, Scott L. Kalpin, William J. Mitchell
  • Patent number: 8061767
    Abstract: There is disclosed a seating system which may included a left seat and a right seat independently supported by left and right suspensions systems, respectively. The left and right suspension systems may provide independent vertical, lateral, azimuthal, and longitudinal roll motion of the left and right seats.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: November 22, 2011
    Assignee: Massachusetts Institute of Technology
    Inventors: Patrik A. Kunzler, Enrique J. Garcia, William J. Mitchell
  • Publication number: 20110264034
    Abstract: Techniques for programming therapy delivered a patient via a medical device are described. One example technique includes receiving a request for a modification to a therapy delivered to a patient via medical device, transmitting a request to a remote networking device for authorization for the modification to the therapy in response to the request for the modification to the therapy, receiving a response to the request for authorization, where the response to the request for authorization indicates whether the requested modification is authorized, and modifying the therapy according to the requested modification when the requested modification is determined to be authorized. In some examples, the medical device includes a medical fluid delivery device.
    Type: Application
    Filed: April 27, 2010
    Publication date: October 27, 2011
    Applicant: Medtronic, Inc.
    Inventors: Earle T. Roberts, Irfan Z. Ali, Emem D. Akpan, Scott L. Kalpin, Varaz Shahmirian, William J. Mitchell
  • Patent number: 8036156
    Abstract: Methods and systems for reconfiguring communications systems are provided. In one embodiment, a radio head interface for a communications system comprises: a first interface for communicating with a signal processing module digitally performing waveform processing to modulate and demodulate radio signals; a second interface for communicating with a radio head for transmitting and receiving wireless radio signals; a first buffer coupled to the first interface for receiving a page of data from the signal processing module, the page of data comprising a page header for communicating reconfiguration parameters and a plurality of digital radio frequency samples representing a modulated radio signal; at least one digital frequency converter coupled to the second interface; and a configuration management unit, the configuration management unit adapted to receive the reconfiguration parameters from the page header and reconfigure the at least one digital frequency converter based on the reconfiguration parameters.
    Type: Grant
    Filed: June 20, 2008
    Date of Patent: October 11, 2011
    Assignee: ADC Telecommunications, Inc.
    Inventors: John M. Hedin, Douglas D. Weaver, Santosh K. Sonbarse, William J. Mitchell, Michael J. Hermel, Donald R. Bauman, Jerry Edward Toms
  • Patent number: 7938210
    Abstract: An in-the-wheel suspension system including a drive mechanism for coupling the rotational motion of a wheel rim to the drive shaft of an electric motor and for supporting the wheel rim with respect to the vehicle chassis using one or more springs and dampers. In a hubless version, a spring member supports extend between a frame member attached to the chassis and a bearing member that engages with the rim. In a version used with a wheel hub, the hub is supported by an axle and the spring member supports the axle in movable relation to the frame member. A pivoting support arm that is attached to the axel and pivots about a pivot point attached to the frame member at a location spaced from the wheel axis may be used to support the hub. A Peaucellier linkage may be used to support the axle for movement along a straight line vertical path, the linkage being attached to the frame member at two fixed pivot points.
    Type: Grant
    Filed: June 15, 2005
    Date of Patent: May 10, 2011
    Assignee: Massachusetts Institute of Technology
    Inventors: Patrik Alwin K├╝nzler, Peter Schmitt, Raul-David V. Poblano, Brian Chan, Philip A. Liang, Franco H. Vairani, Axel Kilian, Ryan C Chin, William J. Mitchell
  • Publication number: 20100280531
    Abstract: A suture bar for securing an implantable medical device into a body. The suture bar including a body member having a length disposed between a first and a second end, the body member being formed of a generally elongate tube that is piercable by a suture needle. The suture bar also including a first and second connector fixedly attached on the first and second end of the body member, the first and second connector operable to connect the implantable medical device to a pocket in a body.
    Type: Application
    Filed: March 29, 2010
    Publication date: November 4, 2010
    Applicant: Medtronic, Inc.
    Inventors: Scott L. Kalpin, James M. Haase, Michelle M. Kavanagh, Leslie A. Carr, William J. Mitchell, Wayne R. Kuechenmeister
  • Publication number: 20100268303
    Abstract: Communication sessions between an external device and an implantable medical device are established by the initiating device periodically transmitted bursts of energy and with the device that is the target of the bursts periodically sniffing for the transmitted bursts of energy. A silent period between bursts may be established and the sniff interval is chosen to avoid repetitively sniffing during the silent period. The length of the bursts may be chosen to reduce the delay in establishing the communications and/or to reduce the power consumption. The implantable medical device may use multiple modes of operation where in some modes the implantable medical device sniffs and in another mode the implantable medical device transmits bursts. The sniff interval for the implantable medical device may vary depending upon the mode. The burst length may vary depending upon whether the external device or the implantable device is transmitting the bursts.
    Type: Application
    Filed: April 19, 2009
    Publication date: October 21, 2010
    Inventors: William J. Mitchell, Earle T. Roberts, David S. Slack
  • Patent number: 7797694
    Abstract: A method of upgrading the system capability of a communications network is provided. The method involves initiating a transfer of at least one set of upgraded system capability software machine-coded instructions to a host card, instructing the host card to begin an upgrade process, determining whether at least one set of system capability software machine-coded instructions on the host card is valid, and completing the transfer of at least one valid set of system capability software machine-coded instructions to the host card, wherein the system capability is upgraded without affecting operation of the network.
    Type: Grant
    Filed: September 19, 2005
    Date of Patent: September 14, 2010
    Assignee: ADC Telecommunications, Inc.
    Inventors: Santosh K. Sonbarse, John M. Hedin, Jeffrey J. Cannon, Paul Schatz, Michael Kremer, William J. Mitchell
  • Patent number: 7729620
    Abstract: Methods and systems for controlling optical power attenuation are provided. A method comprises periodically measuring an optical power of an optical signal received by an optical receiver and periodically measuring a first attenuation control signal voltage. When the optical power measurement is outside a target power range, the method continues with calculating a target voltage necessary to maintain the optical power measurements at a target power level; calculating a second attenuation control signal based on the target voltage, wherein the second attenuation control signal is calculated to provide an over-damped transient response that maintains the second attenuation control signal within a usable range of a variable optical power attenuator; applying a second attenuation control signal voltage based on the second attenuation control signal to the variable optical power attenuator; and adjusting attenuation of the optical signal based on the second attenuation control signal voltage.
    Type: Grant
    Filed: September 29, 2005
    Date of Patent: June 1, 2010
    Assignee: ADC Telecommunications, Inc.
    Inventors: Paul Schatz, Dean Zavadsky, William J. Mitchell, Steve Stuart, Ana Santos
  • Publication number: 20100116572
    Abstract: An autonomous modular wheel assembly includes at least one connector for connecting the wheel control assembly to a vehicle axle, one or more suspension arms that support the assembly with respect to the axle, an electric drive motor connected to a the vehicle wheel, a steering bearing, and a steering actuator. The electric drive motor and steering bearing control the operation of the vehicle wheel in response to commands received via the actuator. The connector has one or more electrical connection points for providing power and information to the wheel assembly. The robot wheel increases the vehicle steering range to up to 150 degrees and enables new vehicle drive modes. The traditional +/?30 degrees of front wheel steering are enabled, as well as at least three new drive modes: four wheel parallel and converse steering, spin on spot steering, and 90 degree sideways motion.
    Type: Application
    Filed: June 25, 2009
    Publication date: May 13, 2010
    Applicant: Massachusetts Institute of Technology
    Inventors: Peter Alfons Schmitt, William J. Mitchell
  • Patent number: 7640019
    Abstract: A communications system dynamically reconfigurable for RF bandwidth and modulation protocols is disclosed. A server comprises one or more radio head interface modules and a call processing software module adapted to communicate with each other. The call processing software is adapted to perform modulation and demodulation of voice and data streams using one or more air interface protocols. A radio head unit coupled to the radio head interface module communicates with one or more subscriber units. The radio head interface module receives either air interface protocol configuration information, or RF signal bandwidth allocation information, from the call processing software module for one or more communication channels, the information providing a timing trigger and a protocol or bandwidth for one or more communication channels. The radio head interface module reconfigures itself for one or more communications channels, based on the change instructed by the call processing software.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: December 29, 2009
    Assignee: ADC Telecommunications, Inc.
    Inventors: David J. Conyers, Jeffrey J. Cannon, Larry G. Fischer, Douglas D. Weaver, Santosh K. Sonbarse, William J. Mitchell, Michael J. Hermel, Donald R. Bauman, Jerry E. Toms, Philip M. Wala
  • Patent number: RE44398
    Abstract: Systems for dynamic reallocation of bandwidth and modulation protocols is provided. In one embodiment, a radio head interface module comprises: a transmit buffer adapted to receive a data stream from a signal processing module and store the data stream as a page of data samples having a page header; a transmit engine; a digital upconverter, the transmit engine adapted to transfer the page of data samples from the transmit buffer to the digital upconverter; a configuration management unit adapted to receive reconfiguration information from the signal processing module, the reconfiguration information including at least one of air interface protocol parameters and bandwidth allocation information; and a memory adapted with digital upconverter parameters. The configuration management unit is accesses the memory to lookup associated digital upconverter parameters based on the reconfiguration information.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: July 30, 2013
    Assignee: ADC Telecommunications, Inc.
    Inventors: David J. Conyers, Jeffrey J. Cannon, Larry G. Fischer, Douglas D. Weaver, Santosh K. Sonbarse, William J. Mitchell, Michael J. Hermel, Donald R. Bauman, Jerry Edward Toms, Philip M. Wala