Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4890058 | Arrangement for measuring the slip of electric induction motors | Gerhard Trenkler, Reinhard Wedekind | 1989-12-26 |
| 4858057 | Multiphase tripping device with short-circuit detection | Kurt Goth | 1989-08-15 |
| 4811154 | Apparatus for rapid recognition of short-circuits | Gerhard Trenkler, Thomas Nippert | 1989-03-07 |