Issued Patents 2017
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9670728 | Rotary impact drill and double-layer drilling rod mechanism | — | 2017-06-06 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9670728 | Rotary impact drill and double-layer drilling rod mechanism | — | 2017-06-06 |