Issued Patents All Time
Showing 26–40 of 40 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6104181 | Voltmeter suitable for medium/high-voltage installations, with a surface wave device | Ansgar Müller, Wolf-Eckhart Bulst, Thomas Ostertag | 2000-08-15 |
| 6046516 | Electronic switch for use with inductive loads | Hermann Zierhut, Heinz Mitlehner | 2000-04-04 |
| 5966008 | Radio-interrogated, surface-wave technology current transformer for high-voltage systems | Wolf-Eckhart Bulst, Thomas Ostertag, Oliver Sczesny, Wolfgang Schelter, Leonhard Reindl +3 more | 1999-10-12 |
| 5880506 | Solid-state switching element with two source electrodes and solid-state switch with such an element | Hermann Zierhut, Heinz Mitlehner, Ingeborg Zierhut | 1999-03-09 |
| 5859579 | Current--limiting switch | David Branston, Jorg Kieser, Werner Hartmann | 1999-01-12 |
| 5844331 | Process for monitoring the wear of at least one contact in a switching device and switching device designed thereof | Jorg Kieser, David Branston, Erich Voss | 1998-12-01 |
| 5808327 | AC controller | Heinz Mitlehner, Hermann Zierhut | 1998-09-15 |
| 5747984 | Switching component for detecting contact erosion | Dietrich Amft, David Branston, Jorg Kieser | 1998-05-05 |
| 5739419 | Apparatus for monitoring the vacuum of a vacuum switch | Wolf-Eckhart Bulst, Thomas Ostertag, Oliver Sczesny | 1998-04-14 |
| 5345180 | Method and arrangement for detecting short-circuits in circuit branches of electrical power system networks | Walter Roethlingshoefer | 1994-09-06 |
| 5153506 | Apparatus for measuring a winding temperature of electric machines | Gerhard Trenkler, Reinhard Wedekind | 1992-10-06 |
| 5023295 | Compositions suitable for coating the surface of electrical high-voltage insulators | Erhard Bosch, Dietrich Wolfer | 1991-06-11 |
| 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 |