Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11891858 | Method and apparatus for alternating between coring and drilling without tripping operations | Per-Erik Berger | 2024-02-06 |
| 11131147 | Core drilling apparatus and method for converting between a core drilling assembly and a full-diameter drilling assembly | Per-Erik Berger, Arne Matzel | 2021-09-28 |