Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4700789 | Device to obtain ring-shaped cavities in the bottom of drilled holes made in any type of medium | — | 1987-10-20 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4700789 | Device to obtain ring-shaped cavities in the bottom of drilled holes made in any type of medium | — | 1987-10-20 |