Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8292991 | Gas mask filter canister | John Schlaechter, Wayne Ballantyne, Robert J. Puhala, David W. Pike | 2012-10-23 |
| 7592178 | Filter integrity tester | Yuqing Ding, Mark Shrewsbury | 2009-09-22 |
| 7585359 | Air filtration media comprising metal-doped silicon-based gel and/or zeolite materials treated with nitric acid and/or potassium persulfate | Michael C. Withiam, Fitzgerald A. Sinclair, Terry W. Nassivera | 2009-09-08 |
| 7559981 | Air filtration media comprising oxidizing agent-treated metal-doped silicon-based gel and zeolite materials | Fitzgerald A. Sinclair, Michael C. Withiam | 2009-07-14 |
| 7377965 | Air filtration media comprising metal-doped silicon-based gel materials | Michael C. Withiam, Fitzgerald A. Sinclair | 2008-05-27 |
| 7311764 | Gas mask filter canister | John Schlaechter, Wayne Ballantyne, Robert J. Puhala, David W. Pike | 2007-12-25 |
| 7213595 | Multi-stage respirator filter with TIM filter option | Andrew Capon, David W. Pike | 2007-05-08 |
| 7115152 | Four bed regenerable filter system | John Creed | 2006-10-03 |
| 6860267 | Self-sealing filter connection and gas mask filter assembly incorporating the same | Andrew Capon, Brian E. Davis, David W. Pike, Gary M. Dunn | 2005-03-01 |