Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6183531 | Mineral wool plant substrate | Jacob Frank De Groot, Paul Jacques Louis Hubert Bouwens | 2001-02-06 |
| 5009031 | Grow-mat for cultivating plants and a method for manufacturing same | Robert J. H. M. van Banning | 1991-04-23 |