Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6948574 | Ultrasonic annular core bit | Till Cramer, Stefan Tichy, Walter Littmann, John Van Taack-Trakranen, Peter Alberg | 2005-09-27 |
| 6731047 | Device with ultrasound adapter | Stefan Tichy, Walter Littmann, Jorg Wallaschek | 2004-05-04 |