Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9291286 | Hollow drill rod for slurry application in a geothermal loop | Terry R. Biggs | 2016-03-22 |
| 8529156 | Bit adapter and tube return for vertizontal geothermal loop | Terry R. Biggs, Blake Edwards | 2013-09-10 |
| 8312938 | Vertizontal geothermal loop and installation method | Terry R. Biggs | 2012-11-20 |
| 8256531 | Vertizontal geothermal loop and installation method | Terry R. Biggs | 2012-09-04 |