Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7934497 | Modular helmet-mask assembly | Stephen E. Chase | 2011-05-03 |
| 7861719 | High surface area chemical/biological air-purifying filter | Stephen E. Chase, Daniel J Barker | 2011-01-04 |