Issued Patents 2021
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11136266 | Thixotropic non-cementitious thermal grout and HDD or trough product line methods of application | Ronald G. Halderman | 2021-10-05 |
| 11035185 | Annular pressure reduction system for horizontal directional drilling | Ronald G. Halderman, Karl D. Quackenbush | 2021-06-15 |
| 10914121 | Pulling product lines underground under obstacles including water bodies | Ronald G. Halderman, Richard Neil Smith, John Steven Meaders, James Williams | 2021-02-09 |