Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE38470 | Method and device for driving at least one capacitive actuator | Christian Hoffmann, Hellmut Freudenberg, Hartmut Gerken, Richard Pirkl | 2004-03-23 |
| 6491027 | Method of driving a capacitive actuator of a fuel injection valve of an internal combustion engine | Hellmut Freudenberg, Hartmut Gerken, Christian Hoffmann, Richard Pirkl | 2002-12-10 |
| 6472796 | Method and apparatus for controlling a capacitive actuator | Christian Hoffmann, Hellmut Freudenberg, Hartmut Gerken, Richard Pirkl | 2002-10-29 |
| 6441535 | Method and apparatus for driving at least one capacitive control element | Hellmut Freudenberg, Hartmut Gerken, Christian Hoffmann, Richard Pirkl, Gunther Riedel | 2002-08-27 |
| 6366868 | Method and configuration for diagnosis of a capacitive actuator | Hellmut Freudenberg, Hartmut Gerken, Christian Hoffmann, Richard Pirkl, Walter Schrod | 2002-04-02 |
| 6333585 | Discharge circuit for a capacitive actuator | Christian Hoffmann, Hellmut Freudenberg, Hartmut Gerken, Richard Pirkl | 2001-12-25 |
| 6212053 | Device and method for driving at least one capacitive actuator | Christian Hoffmann, Hellmut Freudenberg, Hartmut Gerken, Richard Pirkl | 2001-04-03 |
| 6198199 | Method for diagnosing a short circuit at a capacitive actuator | Christian Hoffmann, Hellmut Freudenberg, Hartmut Gerken, Richard Pirkl | 2001-03-06 |
| 6133714 | Method of driving at least one capacitive actuator | Christian Hoffmann, Hellmut Freudenberg, Manfred Weigl, Hartmut Gerken, Richard Pirkl | 2000-10-17 |
| 6119655 | Device and method for regulating a pressure in accumulator injection systems having an electromagnetically actuated pressure adjusting element | Dirk Heinitz, Benno Larisch | 2000-09-19 |
| 6121715 | Method and device for driving a capacitive control element | Christian Hoffmann, Hellmut Freudenberg, Hartmut Gerken, Richard Pirkl | 2000-09-19 |
| 6081062 | Method and device for driving at least one capacitive actuator | Christian Hoffmann, Hellmut Freudenberg, Hartmut Gerken, Richard Pirkl | 2000-06-27 |
| 6078198 | Device and method for driving a capacitive actuator | Hartmut Gerken, Ralf Förster, Richard Pirkl, Christian Hoffmann, Hellmut Freudenberg | 2000-06-20 |
| 6060814 | Device and method for driving at least one capacitive actuator | Christian Hoffmann, Hellmut Freudenberg, Hartmut Gerken, Richard Pirkl | 2000-05-09 |
| 6016040 | Device and method for driving at least one capacitive actuator | Christian Hoffmann, Hellmut Freudenberg, Hartmut Gerken, Richard Pirkl | 2000-01-18 |
| 5986360 | Device and method for controlling at least one capacitive actuator | Hartmut Gerken, Christian Hoffmann, Hellmut Freudenberg, Richard Pirkl | 1999-11-16 |