Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6948574 | Ultrasonic annular core bit | Till Cramer, Adrian Kauf, Walter Littmann, John Van Taack-Trakranen, Peter Alberg | 2005-09-27 |
| 6731047 | Device with ultrasound adapter | Adrian Kauf, Walter Littmann, Jorg Wallaschek | 2004-05-04 |
| 6366232 | Method and sensor for detecting foreign bodies in a medium with a radar | Stefan Liedtke | 2002-04-02 |
| 6246354 | Method of determining of permittivity of concrete and use of the method | Stefan Liedtke | 2001-06-12 |
| 6163292 | Method of determining the ability of a medium to absorb electromagnetic waves and a sensor for detecting foreign bodies in the medium | Stefan Liedtke | 2000-12-19 |