Issued Patents 2017
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9701042 | Method of making diamond mining core drill bit and reamer | Thomas G. Ruffner | 2017-07-11 |
| 9689210 | Diamond mining core drill bit and methods of making thereof | Thomas G. Ruffner | 2017-06-27 |