Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5346332 | Tubbing-type tunnel lining | Alfred Schulter | 1994-09-13 |
| 5339029 | Methods and apparatus for measuring the postion of an edge of a metal strip by electronic induction | — | 1994-08-16 |
| 5332334 | Tunnel wall with lining | Alfred Schulter | 1994-07-26 |
| 5324139 | Method for the construction of long tunnel with a lining | Alfred Schulter, Helmut Pfeil, Otto Schubert | 1994-06-28 |