Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4673309 | Method and apparatus for anchoring cables of high-tensile steel wire | Rudolf Bergermann | 1987-06-16 |
| 4352112 | Reflector with air pressure means | Fritz Leonhardt, Wolfhart Andra, Wilhelm Zellner | 1982-09-28 |
| 4326363 | Waisted envelope for tubular building structures | Fritz Leonhardt, Wolfhart Andra, Wilhelm Zellner, Gunter Mayr | 1982-04-27 |