Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6499562 | Muffler with variable sound-absorbing characteristics | Gerhard Elfinger, Wolfgang Hahnl, Friedrich Wellner, Andreas Mayr, Klaus Spindler +1 more | 2002-12-31 |
| 4977984 | Apparatus and method for detecting elevator car position in a door zone | Hansjorg Arnosti | 1990-12-18 |