Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7921581 | Excavation device | — | 2011-04-12 |
| 7861439 | Method and device for renewing a ballast bed | — | 2011-01-04 |
| 7469479 | Method for measuring tracks | — | 2008-12-30 |
| 6147746 | Process for optical measurement of relative angles | — | 2000-11-14 |
| 6014815 | Machine for producing a design track position | — | 2000-01-18 |
| 5587787 | Process for measuring relative angles | — | 1996-12-24 |
| 5331745 | Process and apparatus for surveying a railway track for any deviation from a track survey plan | — | 1994-07-26 |
| 5255066 | Measuring device for track building machines | — | 1993-10-19 |
| 4564442 | Operating procedure and sifter for the sifting of cement | — | 1986-01-14 |
| 4236888 | Heat exchanger with preliminary calcining | — | 1980-12-02 |
| 4211641 | Circulating air classifier or separator | — | 1980-07-08 |
| 4192469 | Spring roll mill | — | 1980-03-11 |