Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4615411 | Sound-insulated flow duct and process for the manufacture thereof | Hans-Ulrich Breitscheidel, Cosmas Lorry, Helmut Rehlen | 1986-10-07 |
| 4364892 | Process for surface treatment of foamed sheets | Helmut Rehlen | 1982-12-21 |