Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11211043 | Audio enhanced hearing protection system | Joseph G. Butera, III, Robert J. Summers, III, Mark Harpster | 2021-12-28 |
| 10959035 | System, method, and apparatus for generating and digitally processing a head related audio transfer function | Joseph G. Butera, III, Mark Harpster, Litang Gu | 2021-03-23 |