Issued Patents All Time
Showing 26–26 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5342142 | Angular paving stone for paving areas | Gunther Barth, Fritz von Langsdorff | 1994-08-30 |
Showing 26–26 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5342142 | Angular paving stone for paving areas | Gunther Barth, Fritz von Langsdorff | 1994-08-30 |