Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6744000 | High-voltage circuit breaker having an insulating nozzle | Ralf Bergmann, Volker Lehmann, Hold Dienemann | 2004-06-01 |
| 6365863 | High voltage circuit-breaker with a counter-contact which can be actuated | Volker Lehmann, Hold Dienemann, Thomas Chyla | 2002-04-02 |
| 6271494 | High voltage circuit breaker with two arcing contacts which can be actuated in an opposite direction | Hold Dienemann, Volker Lehmann | 2001-08-07 |
| 6177643 | High-voltage circuit-breaker having an axially displaceable field electrode | Volker Lehmann, Hold Dienemann | 2001-01-23 |
| 5739495 | Puffer-type circuit breaker and nozzle emitting gas with coaxial abutting plastic tube | Volker Lehmann | 1998-04-14 |
| 5717183 | High-voltage power switch with a cooling device for cooling the quenching gas | Volker Lehmann, Friedrich Lobner | 1998-02-10 |
| 5589673 | Electric high-tension circuit breaker | Volker Lehmann, Ingolf Reiher | 1996-12-31 |
| 5563389 | High-voltage power switch | Volker Lehmann | 1996-10-08 |
| 5534673 | Electric high-voltage circuit breaker | Volker Lehmann | 1996-07-09 |
| 4827373 | High-voltage compressed-gas circuit breaker | Dieter Noack | 1989-05-02 |
| 4823232 | High-voltage compressed-gas circuit breaker | Dieter Noack | 1989-04-18 |
| 4418255 | Contact arrangement for air-blast switches with a tubular element of ferromagnetic material | Ruediger Hess | 1983-11-29 |
| 4354073 | Electric gas blast circuit breaker | Ruediger Hess | 1982-10-12 |
| 4321439 | Electrical contact construction for air-blast circuit breakers | Rudiger Hess | 1982-03-23 |
| 4293750 | Electric gas blast circuit breaker | — | 1981-10-06 |