Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6817541 | Ozone systems and methods for agricultural applications | David Sands, Allen D. Clawson, Henry Schmitz | 2004-11-16 |
| 6499671 | Ozone systems and methods for agricultural applications | David Sands, Allen D. Clawson | 2002-12-31 |
| 6500332 | Apparatus for purifying spas/jetted tubs | Frank G. Martin | 2002-12-31 |
| 6372148 | Apparatus for purifying spas/jetted tubs | Frank G. Martin | 2002-04-16 |
| 6129850 | Apparatus for purifying spas/jetted tubs | Frank G. Martin | 2000-10-10 |