Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9422160 | Method of making a hydrogen sensing pigment | David K. Benson, Rodney D. Smith | 2016-08-23 |
| 8636883 | Monitorable hydrogen sensor system | David K. Benson | 2014-01-28 |
| 8574917 | Hydrogen sulfide indicating pigments | David K. Benson, Rodney D. Smith | 2013-11-05 |
| 6895805 | Hydrogen gas indicator system | — | 2005-05-24 |
| 6170862 | Motor vehicle steering column safety device | Larry D. Hoagland | 2001-01-09 |
| 5893580 | Motor vehicle steering column safety device | Larry D. Hoagland | 1999-04-13 |