Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7404694 | Method and device for stabilizing a cavity excavated in underground construction | — | 2008-07-29 |
| 5337613 | Measuring instrument for determining displacements in soil, rock, foundation soil or construction materials | — | 1994-08-16 |
| 4739652 | Method of, and tubing and support apparatus for, arranging a tubing assembly for measuring purposes | Jakob Koppel, Christian Amstad | 1988-04-26 |
| 4643024 | Method of, and measuring tube and measuring probe for, measuring fluid pressure in a sealed bore hole | Jakob Koppel | 1987-02-17 |
| 4327590 | Method and apparatus for determining shifts at terrain and in structures | Jakob Koppel, Christian Amstad | 1982-05-04 |