Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881524 | Instsrument for guiding a laser light transmitting fiber | Siegfried Hiltebrandt | 1989-11-21 |
| 4858595 | Mediastinoscope | Gerhard Fritz BUESS, Siegfried Hiltebrandt | 1989-08-22 |