Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9424973 | Coil and method for producing a coil | Bernhard Roellgen | 2016-08-23 |
| 9019042 | High-frequency swinging choke | Bernhard Roellgen | 2015-04-28 |
| 6741156 | Rod-core transformer and a lamp cap having a rod-core transformer | Matthias Burkhardt, Bernhard Roellgen | 2004-05-25 |