Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6409785 | Cleanable HEPA filter media | Alan Smithies, James Roy Doehla | 2002-06-25 |
| 6110249 | Filter element with membrane and bicomponent substrate | Bradley Duane Medcalf, James Roy Doehla, Vikas Madhusudan Nadkarni | 2000-08-29 |
| 5894623 | Disposable lint remover | — | 1999-04-20 |
| 5746792 | Dust collector filter element and supporting structure | Jack T. Clements, Ronald Lawayne Mahoney | 1998-05-05 |