Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4823479 | Material dryer, especially for bulk material travelling continuously through the dryer | Rudolf Langer, Gerhard Troetscher, Anton Hecht | 1989-04-25 |
| 4815181 | Tentering chain track for tentering clamps travelling in a closed-loop in a tentering frame | Rudolf Langer, Hans-Jurgen Maierhofer | 1989-03-28 |