Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8828129 | Two-stage air filter and mask incorporating the same | Giovanni D. Volo | 2014-09-09 |
| 8182568 | Two-stage air filter and mask incorporating the same | Giovanni D. Volo | 2012-05-22 |
| 6874209 | Indoor fan filter | Giovanni D. Volo | 2005-04-05 |
| 6527838 | Indoor fan filter | Giovanni D. Volo | 2003-03-04 |