Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7583047 | Quenching device for a converter bridge with line regeneration | Thomas Biribauer, Franz Hackl, Wilfried Hofmüller, Heinz Pichorner, Wilhelm Ritschel | 2009-09-01 |
| 7443129 | Quenching device for a converter bridge with line regeneration | Thomas Biribauer, Franz Hackl, Wilfried Hofmüller, Heinz Pichorner, Wilhelm Ritschel | 2008-10-28 |
| 6903911 | Protective circuit for a network-controlled thyristor bridge | Wilhelm Reischer, Leo Karl, Heinz Pichorner | 2005-06-07 |
| 4845413 | Device for controlling the field current of DC motors | Franz Hackl, Wolfgang Spitaler | 1989-07-04 |
| 4810955 | Measuring apparatus for determining the countervoltage of electric motors | Franz Hackl | 1989-03-07 |