Issued Patents 2017
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9598905 | Two pipe horizontal directional drilling system | Michael D. Van Zee, Ryan D. Otis, David M. Wisniewski, Robin W. Carlson | 2017-03-21 |
| 9556691 | Horizontal directional drilling system | Michael D. Van Zee | 2017-01-31 |