Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7293801 | Self-stabilizing suspension for wheeled vehicles | John E. Bertrand, William A. Null | 2007-11-13 |
| 7294170 | Apparatus for compressing and storing oxygen enriched gas | Joseph B. Richey, II | 2007-11-13 |
| 7204249 | Oxygen conserving device utilizing a radial multi-stage compressor for high-pressure mobile storage | Joseph B. Richey, II, David D. Polacsek | 2007-04-17 |
| 7083195 | Suspension with releasable locking system | William A. Null | 2006-08-01 |
| 6923180 | Oxygen conserving device utilizing a radial multi-stage compressor for high-pressure mobile storage | Joseph B. Richey, II | 2005-08-02 |
| 6851711 | Vehicle having an anti-dive/lockout mechanism | William A. Null | 2005-02-08 |
| 6805122 | Oxygen conserving device utilizing a radial multi-stage compressor for high-pressure mobile storage | Joseph B. Richey, II | 2004-10-19 |