Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822165 | Device for illuminating components of transparent material in testing for irregularities | Harald Schmalfuss, Reinhold Bolz | 1989-04-18 |
| 4815844 | Device for testing components of transparent material for surface irregularities and occlusions | Harald Schmalfuss, Reinhold Bolz | 1989-03-28 |
| 4798964 | Method and apparatus for the contactless measuring of the tread quality of railroad | Harald Schmalfuss, Hubertus Kurpiella | 1989-01-17 |