Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5967074 | Keel for sail ships | Erich Frantl | 1999-10-19 |
| 5522192 | Hangar | Erich Frantl | 1996-06-04 |
| 4902159 | Joint connection for frame structures | Erich Frantl, Peter Hofstatter, Willibald Zemler, Albert P. Raunicher | 1990-02-20 |
| 4822198 | Joint connection for frame structures | Erich Frantl, Peter Hofstatter, Willibald Zemler, Albert P. Raunicher | 1989-04-18 |