Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4317492 | Method and apparatus for drilling horizontal holes in geological structures from a vertical bore | David Archibold Summers, H. Dean Keith | 1982-03-02 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4317492 | Method and apparatus for drilling horizontal holes in geological structures from a vertical bore | David Archibold Summers, H. Dean Keith | 1982-03-02 |