Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8292991 | Gas mask filter canister | David K. Friday, John Schlaechter, Wayne Ballantyne, David W. Pike | 2012-10-23 |
| 7311764 | Gas mask filter canister | David K. Friday, John Schlaechter, Wayne Ballantyne, David W. Pike | 2007-12-25 |