Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5286139 | Interlocking paving stone for closed and open drainage patterns | — | 1994-02-15 |
| D343460 | Paving stone | — | 1994-01-18 |
| D343238 | Paving stone | — | 1994-01-11 |
| 5244303 | Interlocking paving stone | — | 1993-09-14 |
| 5201843 | Interlocking paving stone for open drainage ground cover pattern | — | 1993-04-13 |
| 5173003 | Interlocking slab element and ground surface cover | — | 1992-12-22 |
| D328499 | Paving stone | — | 1992-08-04 |
| 5108219 | Interlocking paving stone | — | 1992-04-28 |
| 4973192 | Interlocking paving stone and ground cover formed thereof | — | 1990-11-27 |
| 4544305 | Interlocking slab element for covering the ground and the like | — | 1985-10-01 |