Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6634463 | Switch over from the mains supply to a frequency converter by a phase correction process for an escalator drive | Michael Mann, Gunter Blechschmidt, Peter Walden, Robert Oesterle, Michael Bernhard Kocur | 2003-10-21 |
| 6626279 | Process for switching between main supply and a frequency inverter and vice versa for an escalator drive | Reinhard Henkel, Ralph S. Stripling, Richard Markus | 2003-09-30 |
| 6591947 | Use of multi-state sensors | Herbert Horbrugger, Peter Herkel | 2003-07-15 |