Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 6634463 | Switch over from the mains supply to a frequency converter by a phase correction process for an escalator drive | Stefan Spannhake, Michael Mann, Peter Walden, Robert Oesterle, Michael Bernhard Kocur | 2003-10-21 | $87,022,000 |
| 5889238 | Deceleration time for an elevator car | Christoph M. Ernecke, Peter Herkel, Alberto Vecchiotti | 1999-03-30 | $34,529,000 |
| 5765664 | Elevator drive fault detector | Peter Herkel, Wolfgang Lutz Zemke | 1998-06-16 | $11,052,000 |