Issued Patents 2018
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9970237 | Steerable earth boring assembly | Ricki Don Marshall | 2018-05-15 |
| 9890592 | Drive shaft for steerable earth boring assembly | Ricki Don Marshall | 2018-02-13 |
| 9890593 | Steerable earth boring assembly having flow tube with static seal | Ricki Don Marshall | 2018-02-13 |