Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11230890 | Well drilling bit and well drilling method using the same | Shigemi NAGANAWA, Kuniaki Shimada | 2022-01-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11230890 | Well drilling bit and well drilling method using the same | Shigemi NAGANAWA, Kuniaki Shimada | 2022-01-25 |