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).
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Patent number: 11623091Abstract: 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: GrantFiled: February 13, 2020Date of Patent: April 11, 2023Assignee: Avent, Inc.Inventors: Wanzhan Liu, Chris Zobkiw, Gleb Klimovitch, Ryan Caldwell, Eric A. Schepis, Phillip A. Schorr, Jalpa Shah
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Patent number: 11013916Abstract: 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: GrantFiled: September 17, 2018Date of Patent: May 25, 2021Assignee: MEDTRONIC, INC.Inventors: Richard T. Stone, Mark J. Conroy, Wanzhan Liu, Gary W. Salminen
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Patent number: 10780270Abstract: 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: GrantFiled: March 15, 2019Date of Patent: September 22, 2020Assignee: Avent, Inc.Inventors: Eric A. Schepis, Phillip A. Schorr, Wanzhan Liu, Natalia Alexeeva, Shyamant R. Sastry, Amol Soin, David M. Page, Ryan Caldwell
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Publication number: 20200254257Abstract: 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: ApplicationFiled: February 13, 2020Publication date: August 13, 2020Inventors: Wanzhan Liu, Chris Zobkiw, Gleb Klimovitch, Ryan Caldwell, Eric A. Schepis, Phillip A. Schorr, Jalpa Shah
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Publication number: 20190282810Abstract: 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: ApplicationFiled: March 15, 2019Publication date: September 19, 2019Inventors: Eric A. Schepis, Phillip A. Schorr, Wanzhan Liu, Natalia Alexeeva, Shyamy Sastry, Amol Soin, David M. Page
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Publication number: 20190134385Abstract: 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: ApplicationFiled: September 17, 2018Publication date: May 9, 2019Inventors: Richard T. Stone, Mark J. Conroy, Wanzhan Liu, Gary W. Salminen
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Patent number: 10076659Abstract: 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: GrantFiled: November 16, 2015Date of Patent: September 18, 2018Assignee: MEDTRONICS, INC.Inventors: Richard T. Stone, Mark J. Conroy, Wanzhan Liu, Gary W. Salminen
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Publication number: 20160067481Abstract: 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: ApplicationFiled: November 16, 2015Publication date: March 10, 2016Inventors: Richard T. Stone, Mark J. Conroy, Wanzhan Liu, Gary W. Salminen
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Patent number: 9216286Abstract: 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: GrantFiled: April 28, 2010Date of Patent: December 22, 2015Assignee: Medtronic, Inc.Inventors: Richard T. Stone, Mark J. Conroy, Wanzhan Liu, Gary W. Salminen
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Publication number: 20120035697Abstract: 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: ApplicationFiled: April 28, 2010Publication date: February 9, 2012Inventors: Richard T. Stone, Mark J. Conroy, Wanzhan Liu, Gary W. Salminen