Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4759766 | Intervertebral disc endoprosthesis | Karin Buettner-Janz, Bernd Derr, Klaus-Peter Erkel, Hans-Joachim Helisch, Kurt Schellnack | 1988-07-26 |
| 4607830 | Lengthwise folding arrangement with vertically adjustable conical tip folding mandrel | — | 1986-08-26 |