Patents by Inventor Hansen Yuan
Hansen Yuan 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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Publication number: 20030220649Abstract: A system for repairing an intervertebral disc by delivering and curing a biomaterial in situ within the disc. The system includes both a device, having an insertable balloon and related lumen, controls and adapters, as well as an in situ curable biomaterial (and related biomaterial delivery means). The system can allow the doctor to determine a suitable endpoint for biomaterial delivery, by controlling distraction and/or biomaterial delivery pressure, and in turn, to deliver a desired quantity of biomaterial to the balloon in order to achieve improved polymer cure and implant characteristics. Also provided is a related method for repairing an intervertebral disc by using such a system to deliver and cure the biomaterial in situ. The system can be used to implant a prosthetic total disc, or a prosthetic disc nucleus in a manner that leaves the surrounding disc tissue substantially intact.Type: ApplicationFiled: February 13, 2003Publication date: November 27, 2003Inventors: Qi-Bin Bao, Robert Garryl Hudgins, Jeffrey C. Felt, Alexander Arsenyev, Hansen A. Yuan
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Publication number: 20030195628Abstract: A system for repairing an intervertebral disc by delivering and curing a biomaterial in situ within the disc. The system includes both a device, having an insertable balloon and related lumen, controls and adapters, as well as an in situ curable biomaterial (and related biomaterial delivery means). The system can allow the doctor to determine a suitable endpoint for biomaterial delivery, by controlling distraction and/or biomaterial delivery pressure, and in turn, to deliver a desired quantity of biomaterial to the balloon in order to achieve improved polymer cure and implant characteristics. Also provided is a related method for repairing an intervertebral disc by using such a system to deliver and cure the biomaterial in situ. The system can be used to implant a prosthetic total disc, or a prosthetic disc nucleus in a manner that leaves the surrounding disc tissue substantially intact.Type: ApplicationFiled: February 13, 2003Publication date: October 16, 2003Inventors: Qi-Bin Bao, Robert Garryl Hudgins, Jeffrey C. Felt, Alexander Arsenyev, Hansen A. Yuan
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Publication number: 20030125742Abstract: A device is disclosed for securing a spinal rod to the spine which includes a head portion configured to receive a spinal rod, a locking cap configured to engage the head portion and the spinal rod upon rotation of the locking cap relative to the head portion to secure the position of the head portion relative to the spinal rod, and a fastener portion depending from the head portion and configured to engage the spine.Type: ApplicationFiled: February 12, 2003Publication date: July 3, 2003Applicant: Howmedica Osteonics Corp.Inventors: Hansen Yuan, David Nichols, Eric Finley
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Patent number: 6565565Abstract: A device is disclosed for securing a spinal rod to the spine which includes a head portion configured to receive a spinal rod, a locking cap configured to engage the head portion and the spinal rod upon rotation of the locking cap relative to the head portion to secure the position of the head portion relative to the spinal rod, and a fastener portion depending from the head portion and configured to engage the spine.Type: GrantFiled: January 19, 2000Date of Patent: May 20, 2003Assignee: Howmedica Osteonics Corp.Inventors: Hansen Yuan, David Nichols, Eric Finley
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Publication number: 20020165613Abstract: An intervertebral fixation device includes an intervertebral fixation block and one or more bracing elements. The fixation block is provided with one or more joining slots. The bracing elements support the vertebrae under treatment at an insertion front end thereof, when the bracing elements are inserted into the joining slots of the fixation block.Type: ApplicationFiled: April 30, 2002Publication date: November 7, 2002Applicant: Chih-I LINInventors: Chih-I Lin, Seang Beng Tan, Hansen A. Yuan
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Publication number: 20020120272Abstract: A device is disclosed for securing a spinal rod to the spine which includes a head portion configured to receive a spinal rod, a locking cap configured to engage the head portion and the spinal rod upon rotation of the locking cap relative to the head portion to secure the position of the head portion relative to the spinal rod, and a fastener portion depending from the head portion and configured to engage the spine.Type: ApplicationFiled: March 6, 2002Publication date: August 29, 2002Inventors: Hansen Yuan, David Nichols, Eric Finley
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Patent number: 6224630Abstract: A surgical device and related method and kit for use in sealing a biological aperture in situ. In one embodiment, the device is provided in the form of an expandable, porous material such as poly(vinyl alcohol).Type: GrantFiled: May 29, 1998Date of Patent: May 1, 2001Assignee: Advanced Bio Surfaces, Inc.Inventors: Qi-Bin Bao, Hansen A. Yuan
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Patent number: 6214005Abstract: An apparatus for retaining first and second vertebrae of a spinal column in a desired spatial relationship includes a longitudinal member positionable along the spinal column. A member, such as a plate, connectable with the first vertebra has first and second fastener openings and a portion engageable with the longitudinal member. A first fastener extendable through the first fastener opening in the member has a first end portion for attachment to the first vertebra and has a longitudinal axis. A second fastener extendable through the second fastener opening in the member has a first end portion for attachment to the first vertebra and has a longitudinal axis. The longitudinal axes of the first and second fasteners converge at an acute angle as viewed in a sagittal plane when the first and second fasteners connect the member with the first vertebra. The member connectable with the first vertebra has a body portion and has a lip portion projecting from the body portion of the member.Type: GrantFiled: August 28, 1998Date of Patent: April 10, 2001Assignee: Depuy Acromed, Inc.Inventors: Edward C. Benzel, Hansen A. Yuan, Alex Dinello, Michael H. Wefers, Aaron C. Smith
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Patent number: 6193720Abstract: An apparatus for retaining first and second cervical vertebrae of a spinal column in a desired spatial relationship includes a pair of longitudinal members positionable along the spinal column. A first plate connectable to the first vertebra has an inner side surface for engaging an anterior surface of the first vertebra. The first plate interconnects the pair of longitudinal members. A first fastener is engageable with the first plate for connecting the first plate to the first vertebra. The first fastener has a threaded end portion for engaging the first vertebra. A second plate connectable to the second vertebra has an inner side surface for engaging an anterior surface of the second vertebra. The second plate interconnects the longitudinal members. A second fastener is engageable with the second plate for connecting the second plate to the second vertebra. The second fastener has a threaded end portion for engaging the second vertebra.Type: GrantFiled: November 24, 1999Date of Patent: February 27, 2001Assignee: Depuy Orthopaedics, Inc.Inventors: Hansen A. Yuan, Edward C. Benzel, Alex Dinello, Michael H. Wefers, Aaron C. Smith
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Patent number: 6139509Abstract: A disposable, bone graft harvester having a clear, graduated plastic tube tipped with a bone cutting head at one end and a handle or other torque supplying connection at the other end.Type: GrantFiled: September 21, 1998Date of Patent: October 31, 2000Inventors: Hansen Yuan, Peter Stutz, John Dowdle, Serafin Samson
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Patent number: 6036693Abstract: An apparatus for retaining first and second cervical vertebrae of a spinal column in a desired spatial relationship includes a pair of longitudinal members positionable along the spinal column. A first plate connectable to the first vertebra has an inner side surface for engaging an anterior surface of the first vertebra. The first plate interconnects the pair of longitudinal members. First fastener means is engageable with the first plate for connecting the first plate to the first vertebra. The first fastener means has a threaded end portion for engaging the first vertebra. A second plate connectable to the second vertebra has an inner side surface for engaging an anterior surface of the second vertebra. The second plate interconnects the longitudinal members. Second fastener means is engageable with the second plate for connecting the second plate to the second vertebra. The second fastener means has a threaded end portion for engaging the second vertebra.Type: GrantFiled: November 30, 1998Date of Patent: March 14, 2000Assignee: DePuy Orthopaedics, Inc.Inventors: Hansen A. Yuan, Edward C. Benzel, Alex Dinello, Michael H. Wefers, Aaron C. Smith
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Patent number: 5843082Abstract: An apparatus for retaining first and second cervical vertebrae of a spinal column in a desired spatial relationship includes a pair of longitudinal members positionable along the spinal column. A first plate connectable to the first vertebra has an inner side surface for engaging an anterior surface of the first vertebra. The first plate interconnects the pair of longitudinal members. First fastener means is engageable with the first plate for connecting the first plate to the first vertebra. The first fastener means has a threaded end portion for engaging the first vertebra. A second plate connectable to the second vertebra has an inner side surface for engaging an anterior surface of the second vertebra. The second plate interconnects the longitudinal members. Second fastener means is engageable with the second plate for connecting the second plate to the second vertebra. The second fastener means has a threaded end portion for engaging the second vertebra.Type: GrantFiled: May 31, 1996Date of Patent: December 1, 1998Assignee: AcroMed CorporationInventors: Hansen A. Yuan, Edward C. Benzel, Alex Dinello, Michael H. Wefers, Aaron C. Smith
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Patent number: 5833628Abstract: A disposable, bone graft harvester having a clear, graduated plastic tube tipped with a bone cutting head at one end and a handle or other torque supplying connection at the other end.Type: GrantFiled: April 24, 1996Date of Patent: November 10, 1998Inventors: Hansen Yuan, Peter Stutz, John Dowdle, Serafin Samson
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Patent number: 5800549Abstract: A method and apparatus for injecting an elastic spinal implant into a cavity in a spinal disc so as to treat disc degeneration are given. The method and apparatus can be used in a variety of surgical approaches with respect to the patient. An elastic spinal nucleus prosthesis is very quickly inserted into the cavity through a small opening in the disc so that permanent deformation of the prosthesis is avoided.Type: GrantFiled: April 30, 1997Date of Patent: September 1, 1998Assignee: Howmedica Inc.Inventors: Qi-Bin Bao, Paul A. Higham, Charanpreet S. Bagga, Hansen A. Yuan
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Patent number: 5800433Abstract: An apparatus retaining first and second vertebrae of a spinal column in a desired spatial relationship includes a longitudinal member positionable along the spinal column. A member, such as a plate, connectable with the first vertebra has first and second fastener openings and a portion engageable with the longitudinal member. A first fastener extendable through the first fastener opening in the member has a first end portion for attachment to the first vertebra and has a longitudinal axis. A second fastener extendable through the second fastener opening in the member has a first end portion for attachment to the first vertebra and has a longitudinal axis. The longitudinal axes of the first and second fasteners converge at an acute angle as viewed in a sagittal plane when the first and second fasteners connect the member with the first vertebra. The member connectable with the first vertebra has a body portion and has a lip portion projecting from the body portion of the member.Type: GrantFiled: May 31, 1996Date of Patent: September 1, 1998Assignee: AcroMed CorporationInventors: Edward C. Benzel, Hansen A. Yuan, Alex Dinello, Michael H. Wefers, Aaron C. Smith
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Patent number: 5713900Abstract: An apparatus for retaining first and second bone portions in a desired spatial relationship comprises a first member positionable along the first and second bone portions. A second member connectable with the first bone portion has surface member defining an opening. A fastener is extendable through the opening in the second member to connect the second member to the first bone portion. The fastener has a first portion for engaging the first bone portion and a second portion for clamping the first member against the second member to fix the first and second members against relative movement. The first member is also connected to the second bone portion.Type: GrantFiled: May 31, 1996Date of Patent: February 3, 1998Assignee: AcroMed CorporationInventors: Edward C. Benzel, Hansen A. Yuan, Alex Dinello, Michael H. Wefers, Aaron C. Smith
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Patent number: 5681310Abstract: A vertebral auxiliary fixation device comprises a holding mat and a plurality of fastening elements. The holding mat is fastened by the fastening elements to a vertebra such that the holding mat covers the outer side of a foreign object which is implanted in the vertebra, and that the holding mat prevents the implanted foreign object from jutting out of the vertebra. The holding mat and the fastening elements are made of a material capable of being assimilated into the tissues of a human body.Type: GrantFiled: October 30, 1995Date of Patent: October 28, 1997Inventors: Hansen A. Yuan, Chih-I Lin
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Patent number: 5681312Abstract: An apparatus for retaining first and second vertebrae of a spinal column in a desired spatial relationship comprises first and second longitudinal members positionable along the spinal column. A first member connects the first and second longitudinal members to the first vertebra and second member connects the first and second longitudinal members to the second vertebra. A connector for interconnecting the first and second longitudinal members extends between the first and second longitudinal members and transverse to the first and second longitudinal members. The connector includes a band defining first and second openings through which the first and second longitudinal members are extendable.Type: GrantFiled: May 31, 1996Date of Patent: October 28, 1997Assignee: AcroMed CorporationInventors: Hansen A. Yuan, Edward C. Benzel, Alex Dinello, Michael H. Wefers, Aaron C. Smith
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Patent number: 5676701Abstract: An artificial spinal disc for surgical placement between adjacent vertebrae including a first component for attaching to a first vertebrae, the first component having a concave recess, with the concave contoured surface having a circumference of 360.degree.. A second component for attaching to a second vertebrae, the second component including a projection with a convex surface, the convex contoured surface having a circumference of 360.degree.. The corresponding contoured surfaces shaped to allow an unrestricted rotational and a flexion/extension bending motion between the first and second components relative to a patient's normal spinal axis when in a standing position with the spine in a straightened position.Type: GrantFiled: June 7, 1995Date of Patent: October 14, 1997Assignee: Smith & Nephew, Inc.Inventors: Hansen A. Yuan, Chih-I Lin, James A. Davidson, Laura C. Small, Thomas A. Carls
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Patent number: 5658337Abstract: A intervertebral fusion implant includes first and second bearing surfaces which oppose cortical bone upon insertion of the implant into a bore formed between two vertebrae. The implant includes first and second ridges which extend from the bearing surface. The ridges extend through the cortical bone into cancellous bone. The ridges are provided with openings formed through the ridges. The openings are in communication with the interior of the implant.Type: GrantFiled: April 17, 1996Date of Patent: August 19, 1997Assignee: Spine-Tech, Inc.Inventors: Douglas W. Kohrs, Hansen A. Yuan, David W. Stassen