Issued Patents 2011
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7975781 | Kelly driver | — | 2011-07-12 |
| 7926594 | Bearing assembly inner barrel and well drilling equipment comprising same | — | 2011-04-19 |
| 7918291 | Spring preloaded bearing assembly and well drilling equipment comprising same | — | 2011-04-05 |
| 7891426 | Heat exchanger system and method of use thereof and well drilling equipment comprising same | — | 2011-02-22 |
| 7874353 | Bearing assembly retaining apparatus and well drilling equipment comprising same | — | 2011-01-25 |
| 7866382 | Spring load seal assembly and well drilling equipment comprising same | — | 2011-01-11 |