Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6279381 | Vibration pickup with pressure sheath | Hartmut Brammer, Romuald Fries, Holger Krebs | 2001-08-28 |
| 5872307 | Vibration pick-up with pressure sleeve | Hartmut Brammer, Holger Krebs, Manfred Schuetzmeier | 1999-02-16 |
| 5798453 | Pressure sleeve | Hartmut Brammer, Friedrich Jaki, Holger Krebs | 1998-08-25 |
| 5739418 | Vibration pick-up and method of producing the same | Volker Woehl, Holger Krebs | 1998-04-14 |