Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5813089 | Duct cleaning apparatus | James Richard Nolan | 1998-09-29 |
| 5593470 | Portable filtration unit | David M. Shagott, Blair Lawrence Harber, Daniel N. Sutherland, Terrell F. Travis | 1997-01-14 |
| 5588985 | Methods of using a portable filtration unit | David M. Shagott, Blair Lawrence Harber, Daniel N. Sutherland, Terrell F. Travis | 1996-12-31 |
| 5433763 | Portable filtration unit | David M. Shagott, Daniel N. Sutherland, Blair Lawrence Harber, Henry Koudys | 1995-07-18 |
| 5230723 | Portable filtration unit | Terrell F. Travis, David M. Shagott, Daniel N. Sutherland, Blair Lawrence Harber | 1993-07-27 |
| 5069691 | Portable filtration unit | Terrell F. Travis, David M. Shagott, Daniel N. Sutherland, Blair Lawrence Harber | 1991-12-03 |
| 4471495 | Protective glove | Ross E. MacDonald | 1984-09-18 |