Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6155810 | Mould bed for manufacturing pre-stressed concrete elements | — | 2000-12-05 |
| 4522367 | Matrix array for manufacturing concrete sleeper blocks | — | 1985-06-11 |
| 4495127 | Method of manufacturing concrete sleeper blocks | — | 1985-01-22 |
| 4415120 | Device for sleepers for railway tracks | — | 1983-11-15 |
| 4290991 | Method of manufacturing concrete sleeper blocks and a matrix array for carrying out the method | — | 1981-09-22 |
| 4236670 | Arrangement at a railroad crossing | Sten Limmergard | 1980-12-02 |