Patents by Inventor Andy Wonyong Choi
Andy Wonyong Choi 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: 9956007Abstract: Systems, devices, and methods for treating the spine are disclosed herein. Medical devices can be positioned along a subject's spine to treat various conditions and diseases. The medical device can include an actuator assembly and a clamp assembly. The actuator assembly can be positioned at an interspinous space between a superior spinous process and an inferior spinous process. The actuator assembly can be used to reconfigure the clamp assembly such that the clamp assembly clamps onto the superior and inferior spinous processes.Type: GrantFiled: November 16, 2012Date of Patent: May 1, 2018Assignee: Howmedica Osteonics Corp.Inventors: Andy Wonyong Choi, Kim Thien Nguyen, Robert Leslie Richards
-
Publication number: 20170231670Abstract: A polyaxial screwdriver for inserting a bone screw in a vertebra. A polyaxial bone screw assembly includes a coupling element. When a screw engaging end of the polyaxial screwdriver is lowered on the head of the bone screw, the complimentary surfaces of the screw engaging end of the screwdriver and the head of the screw self-align. A ratchet mechanism formed in the screwdriver provides progressive and automatic locking of the polyaxial screwdriver to the coupling element and prevents the accidental unthreading from the coupling element. In another embodiment of the polyaxial screwdriver, a collet slides over the outside surface of the upper end of the coupling element and locks on to the coupling element. In yet another embodiment of a polyaxial screwdriver, the outer sleeve of the polyaxial screwdriver has a split end that securely engages the coupling element.Type: ApplicationFiled: May 1, 2017Publication date: August 17, 2017Inventors: Amir Ali Sharifi-Mehr, Ernie Corrao, Andy Wonyong Choi
-
Publication number: 20170224392Abstract: An instrument for spinal rotation that aligns and holds direct vertebral rotation (DVR) lever arms relative to each other to achieve an initial axial alignment of a segment of vertebrae and allows the final DVR rotation by rotating the instrument and lever arms together. A method of direct vertebral rotation that allows rotating the vertebrae to be aligned relative to each other, and collectively rotating the vertebrae to be aligned relative to adjacent spinal segments by rotating the direct vertebral rotation instrument. A system for direct vertebral rotation having at least two pedicle screws. The system also includes at least two levers attachable to the pedicle screws and a clamping instrument configured to clamp the levers.Type: ApplicationFiled: December 19, 2016Publication date: August 10, 2017Inventors: Andy Wonyong Choi, Michael L. Schmitz, Se-il Suk
-
Patent number: 9649139Abstract: A polyaxial screwdriver for inserting a bone screw in a vertebra. A polyaxial bone screw assembly includes a coupling element. When a screw engaging end of the polyaxial screwdriver is lowered on the head of the bone screw, the complimentary surfaces of the screw engaging end of the screwdriver and the head of the screw self-align. A ratchet mechanism formed in the screwdriver provides progressive and automatic locking of the polyaxial screwdriver to the coupling element and prevents the accidental unthreading from the coupling element. In another embodiment of the polyaxial screwdriver, a collet slides over the outside surface of the upper end of the coupling element and locks on to the coupling element. In yet another embodiment of a polyaxial screwdriver, the outer sleeve of the polyaxial screwdriver has a split end that securely engages the coupling element.Type: GrantFiled: March 18, 2015Date of Patent: May 16, 2017Assignee: Stryker European Holdings I, LLCInventors: Amir Ali Sharifi-Mehr, Ernie Corrao, Andy Wonyong Choi
-
Patent number: 9554832Abstract: An instrument for spinal rotation that aligns and holds direct vertebral rotation (DVR) lever arms relative to each other to achieve an initial axial alignment of a segment of vertebrae and allows the final DVR rotation by rotating the instrument and lever arms together. A method of direct vertebral rotation that allows rotating the vertebrae to be aligned relative to each other, and collectively rotating the vertebrae to be aligned relative to adjacent spinal segments by rotating the direct vertebral rotation instrument. A system for direct vertebral rotation having at least two pedicle screws. The system also includes at least two levers attachable to the pedicle screws and a clamping instrument configured to clamp the levers.Type: GrantFiled: May 8, 2013Date of Patent: January 31, 2017Assignee: Stryker European Holdings I, LLCInventors: Andy Wonyong Choi, Michael L. Schmitz, Se-il Suk
-
Publication number: 20150190182Abstract: A polyaxial screwdriver for inserting a bone screw in a vertebra. A polyaxial bone screw assembly includes a coupling element. When a screw engaging end of the polyaxial screwdriver is lowered on the head of the bone screw, the complimentary surfaces of the screw engaging end of the screwdriver and the head of the screw self-align. A ratchet mechanism formed in the screwdriver provides progressive and automatic locking of the polyaxial screwdriver to the coupling element and prevents the accidental unthreading from the coupling element. In another embodiment of the polyaxial screwdriver, a collet slides over the outside surface of the upper end of the coupling element and locks on to the coupling element. In yet another embodiment of a polyaxial screwdriver, the outer sleeve of the polyaxial screwdriver has a split end that securely engages the coupling element.Type: ApplicationFiled: March 18, 2015Publication date: July 9, 2015Inventors: Amir Ali Sharifi-Mehr, Ernie Corrao, Andy Wonyong Choi
-
Patent number: 8998921Abstract: A polyaxial screwdriver for inserting a bone screw in a vertebra. A polyaxial bone screw assembly includes a coupling element. When a screw engaging end of the polyaxial screwdriver is lowered on the head of the bone screw, the complimentary surfaces of the screw engaging end of the screwdriver and the head of the screw self-align. A ratchet mechanism formed in the screwdriver provides progressive and automatic locking of the polyaxial screwdriver to the coupling element and prevents the accidental unthreading from the coupling element. In another embodiment of the polyaxial screwdriver, a collet slides over the outside surface of the upper end of the coupling element and locks on to the coupling element. In yet another embodiment of a polyaxial screwdriver, the outer sleeve of the polyaxial screwdriver has a split end that securely engages the coupling element.Type: GrantFiled: June 28, 2012Date of Patent: April 7, 2015Assignee: Stryker SpineInventors: Amir Ali Sharifi-Mehr, Ernie Corrao, Andy Wonyong Choi
-
Publication number: 20130245694Abstract: An instrument for spinal rotation that aligns and holds direct vertebral rotation (DVR) lever arms relative to each other to achieve an initial axial alignment of a segment of vertebrae and allows the final DVR rotation by rotating the instrument and lever arms together. A method of direct vertebral rotation that allows rotating the vertebrae to be aligned relative to each other, and collectively rotating the vertebrae to be aligned relative to adjacent spinal segments by rotating the direct vertebral rotation instrument. A system for direct vertebral rotation having at least two pedicle screws. The system also includes at least two levers attachable to the pedicle screws and a clamping instrument configured to clamp the levers.Type: ApplicationFiled: May 8, 2013Publication date: September 19, 2013Applicant: STRYKER SPINEInventors: Andy Wonyong Choi, Michael L. Schmitz, Se-il Suk
-
Patent number: 8465529Abstract: An instrument for spinal rotation that aligns and holds direct vertebral rotation (DVR) lever arms relative to each other to achieve an initial axial alignment of a segment of vertebrae and allows the final DVR rotation by rotating the instrument and lever arms together. A method of direct vertebral rotation that allows rotating the vertebrae to be aligned relative to each other, and collectively rotating the vertebrae to be aligned relative to adjacent spinal segments by rotating the direct vertebral rotation instrument. A system for direct vertebral rotation having at least two pedicle screws. The system also includes at least two levers attachable to the pedicle screws and a clamping instrument configured to clamp the levers.Type: GrantFiled: May 16, 2008Date of Patent: June 18, 2013Assignee: Stryker SpineInventors: Andy Wonyong Choi, Michael L. Schmitz, Se-Il Suk
-
Publication number: 20120271364Abstract: A polyaxial screwdriver for inserting a bone screw in a vertebra. A polyaxial bone screw assembly includes a coupling element. When a screw engaging end of the polyaxial screwdriver is lowered on the head of the bone screw, the complimentary surfaces of the screw engaging end of the screwdriver and the head of the screw self-align. A ratchet mechanism formed in the screwdriver provides progressive and automatic locking of the polyaxial screwdriver to the coupling element and prevents the accidental unthreading from the coupling element. In another embodiment of the polyaxial screwdriver, a collet slides over the outside surface of the upper end of the coupling element and locks on to the coupling element. In yet another embodiment of a polyaxial screwdriver, the outer sleeve of the polyaxial screwdriver has a split end that securely engages the coupling element.Type: ApplicationFiled: June 28, 2012Publication date: October 25, 2012Applicant: STRYKER SPINEInventors: Amir Ali Sharifi-Mehr, Ernie Corrao, Andy Wonyong Choi
-
Patent number: 8231635Abstract: A polyaxial screwdriver for inserting a bone screw in a vertebra. A polyaxial bone screw assembly includes a coupling element. When a screw engaging end of the polyaxial screwdriver is lowered on the head of the bone screw, the complimentary surfaces of the screw engaging end of the screwdriver and the head of the screw self-align. A ratchet mechanism formed in the screwdriver provides progressive and automatic locking of the polyaxial screwdriver to the coupling element and prevents the accidental unthreading from the coupling element. In another embodiment of the polyaxial screwdriver, a collet slides over the outside surface of the upper end of the coupling element and locks on to the coupling element. In yet another embodiment of a polyaxial screwdriver, the outer sleeve of the polyaxial screwdriver has a split end that securely engages the coupling element.Type: GrantFiled: January 15, 2008Date of Patent: July 31, 2012Assignee: Stryker SpineInventors: Amir Ali Sharifi-Mehr, Ernie Corrao, Andy Wonyong Choi
-
Patent number: 7981161Abstract: The system to implant a prosthetic device in a long bone such as a femur or a humerus includes a stem implant having a recess. The system of present invention also includes a broach to prepare the long bone that may receive the stem implant. The broach also has a recess that is similar to the recess in the stem implant. An adapter of a generally rectangular shape similar to the recess fits snugly in the recess in the stem implant. A trial neck that fits snugly in the recess formed in the adapter is also provided. A trial head may be assembled on the trial neck. A neck similar to the trial neck can be inserted in place of trial neck. A head may be assembled on the proximal end of the neck. A system for implantation of a prosthetic device in a long bone may be made available as a kit that includes at least two stems having the adapter inserted in each of the stem, at least two trial necks, at least two trial heads, at least two necks and at least two heads.Type: GrantFiled: August 17, 2007Date of Patent: July 19, 2011Assignee: Howmedica Osteonics Corp.Inventors: Andy Wonyong Choi, Philip Bryan, Michael Bausch, Scott Kennard
-
Patent number: 7849766Abstract: A screwdriver is disclosed including a handle, a shaft, and a gearbox disposed between the handle and the shaft. The gearbox is structured and arranged to cause rotational motion of the shaft at a first rate due to rotational motion imparted on the handle at a second rate. In an embodiment, the first rate is greater than the second rate.Type: GrantFiled: May 14, 2008Date of Patent: December 14, 2010Assignee: Stryker SpineInventors: Amir Ali Sharifi-Mehr, Andy Wonyong Choi, Steven Krause
-
Publication number: 20090048682Abstract: The system to implant a prosthetic device in a long bone such as a femur or a humerus includes a stem implant having a recess. The system of present invention also includes a broach to prepare the long bone that may receive the stem implant. The broach also has a recess that is similar to the recess in the stem implant. An adapter of a generally rectangular shape similar to the recess fits snugly in the recess in the stem implant. A trial neck that fits snugly in the recess formed in the adapter is also provided. A trial head may be assembled on the trial neck. A neck similar to the trial neck can be inserted in place of trial neck. A head may be assembled on the proximal end of the neck. A system for implantation of a prosthetic device in a long bone may be made available as a kit that includes at least two stems having the adapter inserted in each of the stem, at least two trial necks, at least two trial heads, at least two necks and at least two heads.Type: ApplicationFiled: August 17, 2007Publication date: February 19, 2009Applicant: Howmedica Osteonics Corp.Inventors: Andy Wonyong Choi, Philip Bryan, Michael Bausch, Scott Kennard
-
Publication number: 20080294206Abstract: An instrument for spinal rotation that aligns and holds direct vertebral rotation (DVR) lever arms relative to each other to achieve an initial axial alignment of a segment of vertebrae and allows the final DVR rotation by rotating the instrument and lever arms together. A method of direct vertebral rotation that allows rotating the vertebrae to be aligned relative to each other, and collectively rotating the vertebrae to be aligned relative to adjacent spinal segments by rotating the direct vertebral rotation instrument. A system for direct vertebral rotation having at least two pedicle screws. The system also includes at least two levers attachable to the pedicle screws and a clamping instrument configured to clamp the levers.Type: ApplicationFiled: May 16, 2008Publication date: November 27, 2008Applicant: Stryker SpineInventors: Andy Wonyong Choi, Michael L. Schmitz, Se-Il Suk
-
Publication number: 20080282846Abstract: A screwdriver is disclosed including a handle, a shaft, and a gearbox disposed between the handle and the shaft. The gearbox is structured and arranged to cause rotational motion of the shaft at a first rate due to rotational motion imparted on the handle at a second rate. In an embodiment, the first rate is greater than the second rate.Type: ApplicationFiled: May 14, 2008Publication date: November 20, 2008Applicant: Stryker SpineInventors: Amir Ali Sharifi-Mehr, Andy Wonyong Choi, Steven Krause
-
Publication number: 20080221583Abstract: A polyaxial screwdriver for inserting a bone screw in a vertebra. A polyaxial bone screw assembly includes a coupling element. When a screw engaging end of the polyaxial screwdriver is lowered on the head of the bone screw, the complimentary surfaces of the screw engaging end of the screwdriver and the head of the screw self-align. A ratchet mechanism formed in the screwdriver provides progressive and automatic locking of the polyaxial screwdriver to the coupling element and prevents the accidental unthreading from the coupling element. In another embodiment of the polyaxial screwdriver, a collet slides over the outside surface of the upper end of the coupling element and locks on to the coupling element. In yet another embodiment of a polyaxial screwdriver, the outer sleeve of the polyaxial screwdriver has a split end that securely engages the coupling element.Type: ApplicationFiled: January 15, 2008Publication date: September 11, 2008Inventors: Amir Ali Sharifi-Mehr, Ernie Corrao, Andy Wonyong Choi