Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8020636 | Method and apparatus for introducing a geothermal probe into the earth | — | 2011-09-20 |
| 8016049 | Method and apparatus for installing a borehole heat exchanger in the earth | Hans-Joachim Bayer | 2011-09-13 |
| 7963723 | Overdrilling apparatus | Hans-Joachim Bayer, Udo Harer | 2011-06-21 |