Issued Patents 2018
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9943889 | Hole cleaning apparatus and method | Eric Whinnem, Gary A. Lipczynski, Wesley E. Holleman | 2018-04-17 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9943889 | Hole cleaning apparatus and method | Eric Whinnem, Gary A. Lipczynski, Wesley E. Holleman | 2018-04-17 |