Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6067757 | Tilt-up concrete panel and forming system therefore | Timothy Andrew Olson | 2000-05-30 |
| 4667609 | Apparatus and method for treatment of soil contaminated with hydrocarbons | N. Robert Crain | 1987-05-26 |
| 4477718 | Infrared furnace with controlled environment | Norman R. Crain | 1984-10-16 |
| 4460821 | Infrared furnace with muffle | N. Robert Crain | 1984-07-17 |
| 4406944 | Devices for mounting infrared lamps in furnaces | N. Robert Crain | 1983-09-27 |