Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D417514 | Paving | Harald von Langsdorff | 1999-12-07 |
| D399978 | Paving element | Gunther Barth, Harald von Langsdorff | 1998-10-20 |
| D391647 | Paving | Harald von Langsdorff | 1998-03-03 |
| 5713173 | Hexagonal mosaic paving pattern | Harald von Langsdorff | 1998-02-03 |
| 5342142 | Angular paving stone for paving areas | Gunther Barth, Harald von Langsdorff | 1994-08-30 |
| 4583341 | Interlocking ground covering elements and arrangements of them for mechanical laying | Gunter Barth | 1986-04-22 |
| 4194853 | Method and apparatus for producing a ground covering from individual paving stones | Gunter Barth, Kurt Rossmann | 1980-03-25 |
| 4185939 | Ground covering slab | Gunter Barth | 1980-01-29 |