Issued Patents 2016
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9456846 | Directional sequential dilation system with neuro monitoring | — | 2016-10-04 |
| 9386916 | Three-blade spinal retractor | Michael S. Butler | 2016-07-12 |
| 9351768 | Bone screw retention in a spinal implant | James A. Rinner, Michael S. Butler | 2016-05-31 |