Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5931111 | Ship hatch cover | Glen E. Shields | 1999-08-03 |
| 5778815 | Ship hatch cover | Glen E. Shields | 1998-07-14 |
| 5531800 | Liquid spray air purification and controlled humidification apparatus | Frederic D. Sewell | 1996-07-02 |
| 5531801 | Liquid spray air purification and controlled humidification apparatus with air quality monitor and controller | Frederic D. Sewell | 1996-07-02 |
| 5389120 | Heating, ventilation and air conditioning unit with automatically controlled water spray air purification system | Frederic D. Sewell | 1995-02-14 |