Patents by Inventor Wanzhan Liu

Wanzhan Liu 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: 11623091
    Abstract: The present disclosure is directed to a portable system and method for modulating targeted neural and non-neural tissue of a nervous system to block nerve conduction for the treatment of pain. A high-efficiency portable electrical stimulation system is provided that allows a user to carry the system and move around freely while continuously receiving therapy. The electronic control system is configured to deliver high-frequency electrical stimulation at a therapeutic level, for an intended duration (e.g., up to 24 hours or more) at a manageable and/or comfortable weight for a person, to the target nerve.
    Type: Grant
    Filed: February 13, 2020
    Date of Patent: April 11, 2023
    Assignee: Avent, Inc.
    Inventors: Wanzhan Liu, Chris Zobkiw, Gleb Klimovitch, Ryan Caldwell, Eric A. Schepis, Phillip A. Schorr, Jalpa Shah
  • Patent number: 11013916
    Abstract: Implantable medical leads include a shield that is guarded at a termination by having a first portion and a second portion of the shield, where the first portion is between a termination of the shield at the second portion and an inner insulation layer that surrounds the filars. The first portion may reduce the coupling of RF energy from the termination of the shield at the second portion to the filars. The first and second portions may be part of a continuous shield, where the first and second portions are separated by an inversion of the shield. The first and second portions may instead be separate pieces. The first portion may be noninverted and reside between the termination at the second portion and the inner layers, or the first portion may be inverted to create first and second sub-portions. The shield termination at the second portion is between the first and second sub-portions.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: May 25, 2021
    Assignee: MEDTRONIC, INC.
    Inventors: Richard T. Stone, Mark J. Conroy, Wanzhan Liu, Gary W. Salminen
  • Patent number: 10780270
    Abstract: The exemplified systems and methods facilitate a nerve conduction block at a target nerve using electrical stimulation applied from one or more electrodes located on a percutaneous lead that are placed in parallel, or substantially in parallel, and without direct contact, to a long axis of the peripheral nerve over an overlapping nerve region of greater than about 3 millimeters. The exemplified system and method can be further configured to block nerve condition without eliciting onset activity and co-excitation of non-targeted structures. The exemplified method and system can be performed using conventional percutaneous leads, though an improved percutaneous lead design is disclosed herein. In an aspect, an introducer is disclosed that facilitates accurate and consistent insertion of the percutaneous lead to the specified or intended position relative to the target nerve. In another aspect, a treatment kit comprising the various system components to treat pain is disclosed.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: September 22, 2020
    Assignee: Avent, Inc.
    Inventors: Eric A. Schepis, Phillip A. Schorr, Wanzhan Liu, Natalia Alexeeva, Shyamant R. Sastry, Amol Soin, David M. Page, Ryan Caldwell
  • Publication number: 20200254257
    Abstract: The present disclosure is directed to a portable system and method for modulating targeted neural and non-neural tissue of a nervous system to block nerve conduction for the treatment of pain. A high-efficiency portable electrical stimulation system is provided that allows a user to carry the system and move around freely while continuously receiving therapy. The electronic control system is configured to deliver high-frequency electrical stimulation at a therapeutic level, for an intended duration (e.g., up to 24 hours or more) at a manageable and/or comfortable weight for a person, to the target nerve.
    Type: Application
    Filed: February 13, 2020
    Publication date: August 13, 2020
    Inventors: Wanzhan Liu, Chris Zobkiw, Gleb Klimovitch, Ryan Caldwell, Eric A. Schepis, Phillip A. Schorr, Jalpa Shah
  • Publication number: 20190282810
    Abstract: The exemplified systems and methods facilitate a nerve conduction block at a target nerve using electrical stimulation applied from one or more electrodes located on a percutaneous lead that are placed in parallel, or substantially in parallel, and without direct contact, to a long axis of the peripheral nerve over an overlapping nerve region of greater than about 3 millimeters. The exemplified system and method can be further configured to block nerve condition without eliciting onset activity and co-excitation of non-targeted structures. The exemplified method and system can be performed using conventional percutaneous leads, though an improved percutaneous lead design is disclosed herein. In an aspect, an introducer is disclosed that facilitates accurate and consistent insertion of the percutaneous lead to the specified or intended position relative to the target nerve. In another aspect, a treatment kit comprising the various system components to treat pain is disclosed.
    Type: Application
    Filed: March 15, 2019
    Publication date: September 19, 2019
    Inventors: Eric A. Schepis, Phillip A. Schorr, Wanzhan Liu, Natalia Alexeeva, Shyamy Sastry, Amol Soin, David M. Page
  • Publication number: 20190134385
    Abstract: Implantable medical leads include a shield that is guarded at a termination by having a first portion and a second portion of the shield, where the first portion is between a termination of the shield at the second portion and an inner insulation layer that surrounds the filars. The first portion may reduce the coupling of RF energy from the termination of the shield at the second portion to the filars. The first and second portions may be part of a continuous shield, where the first and second portions are separated by an inversion of the shield. The first and second portions may instead be separate pieces. The first portion may be noninverted and reside between the termination at the second portion and the inner layers, or the first portion may be inverted to create first and second sub-portions. The shield termination at the second portion is between the first and second sub-portions.
    Type: Application
    Filed: September 17, 2018
    Publication date: May 9, 2019
    Inventors: Richard T. Stone, Mark J. Conroy, Wanzhan Liu, Gary W. Salminen
  • Patent number: 10076659
    Abstract: Implantable medical leads include a shield that is guarded at a termination by having a first portion and a second portion of the shield, where the first portion is between a termination of the shield at the second portion and an inner insulation layer that surrounds the filars. The first portion may reduce the coupling of RF energy from the termination of the shield at the second portion to the filars. The first and second portions may be part of a continuous shield, where the first and second portions are separated by an inversion of the shield. The first and second portions may instead be separate pieces. The first portion may be noninverted and reside between the termination at the second portion and the inner layers, or the first portion may be inverted to create first and second sub-portions. The shield termination at the second portion is between the first and second sub-portions.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: September 18, 2018
    Assignee: MEDTRONICS, INC.
    Inventors: Richard T. Stone, Mark J. Conroy, Wanzhan Liu, Gary W. Salminen
  • Publication number: 20160067481
    Abstract: Implantable medical leads include a shield that is guarded at a termination by having a first portion and a second portion of the shield, where the first portion is between a termination of the shield at the second portion and an inner insulation layer that surrounds the filars. The first portion may reduce the coupling of RF energy from the termination of the shield at the second portion to the filars. The first and second portions may be part of a continuous shield, where the first and second portions are separated by an inversion of the shield. The first and second portions may instead be separate pieces. The first portion may be noninverted and reside between the termination at the second portion and the inner layers, or the first portion may be inverted to create first and second sub-portions. The shield termination at the second portion is between the first and second sub-portions.
    Type: Application
    Filed: November 16, 2015
    Publication date: March 10, 2016
    Inventors: Richard T. Stone, Mark J. Conroy, Wanzhan Liu, Gary W. Salminen
  • Patent number: 9216286
    Abstract: Implantable medical leads include a shield that is guarded at a termination by having a first portion and second portion of the shield, where the first portion is between a termination of the shield at the second portion and an inner insulation layer surrounding the filars. The first portion may reduce the coupling of RF energy from the termination of the shield at the second portion to the filars. The first and second portions may be part of a continuous shield, where the first and second portions are separated by an inversion of the shield. The first and second portions may instead be separate pieces. The first portion may be noninverted residing between the termination at the second portion and inner layers, or the first portion may be inverted to create first and second sub-portions. The shield termination at the second portion is between the first and second sub-portions.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: December 22, 2015
    Assignee: Medtronic, Inc.
    Inventors: Richard T. Stone, Mark J. Conroy, Wanzhan Liu, Gary W. Salminen
  • Publication number: 20120035697
    Abstract: Implantable medical leads include a shield that is guarded at a termination by having a first portion and second portion of the shield, where the first portion is between a termination of the shield at the second portion and an inner insulation layer surrounding the filars. The first portion may reduce the coupling of RF energy from the termination of the shield at the second portion to the filars. The first and second portions may be part of a continuous shield, where the first and second portions are separated by an inversion of the shield. The first and second portions may instead be separate pieces. The first portion may be noninverted residing between the termination at the second portion and inner layers, or the first portion may be inverted to create first and second sub-portions. The shield termination at the second portion is between the first and second sub-portions.
    Type: Application
    Filed: April 28, 2010
    Publication date: February 9, 2012
    Inventors: Richard T. Stone, Mark J. Conroy, Wanzhan Liu, Gary W. Salminen