Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8834065 | Water detention system incorporating a composite drainage membrane | Stephen Richard Spikes | 2014-09-16 |
| 7942015 | Water sump structure | — | 2011-05-17 |
| 7168884 | Reinforced permeable paving structure | — | 2007-01-30 |
| 6939077 | Paving block | — | 2005-09-06 |