Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5000483 | Interior noise reduction in motor vehicles | Ehrenfried Blumel, Manfred Hoffmann, Klaus Wittenmayer, Thomas Stankiewicz, Christoph Kittel | 1991-03-19 |
| 4735284 | Adhesive insulation system | Manfred Hoffmann, Christoph Kittel | 1988-04-05 |
| 4705139 | Sound insulation part for surfaces | Manfred Hoffmann, Norbert Seemann | 1987-11-10 |
| 4663381 | Interior noise reduction in motor vehicles | Ehrenfried Blumel, Manfred Hoffmann, Klaus Wittenmayer, Thomas Stankiewicz, Christoph Kittel | 1987-05-05 |
| 4655496 | Motor vehicle noise insulation | Klaus Wittenmayer, Manfred Laubner, Herbert Baumeister | 1987-04-07 |
| 4574915 | Sound barriers | Manfred Hoffmann, Klaus Wittenmayer | 1986-03-11 |