Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D1007768 | Helmet core | David R. Hall | 2023-12-12 |
| 11523652 | Helmet | David R. Hall, Zak KOSTER | 2022-12-13 |
| D907858 | Helmet | David R. Hall | 2021-01-12 |
| 4278453 | Gas purification | — | 1981-07-14 |