Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6312493 | Water soluble fertilizer compositions | Michael Gustaaf Eltink, Philip van Roij, Edze Jan Tijsma, Johannes Gijsbertus Antonius Terlingen | 2001-11-06 |
| 6139597 | Controlled release fertilizer compositions and processes for the preparation thereof | Edze Jan Tijsma, Johannes Gijsbertus Antonius Terlingen | 2000-10-31 |
| 5993505 | Controlled release fertilizer compositions and processes for the preparation thereof | Edze Jan Tijsma, Johannes Gijsbertus Antonius Terlingen, Seija Helena Aalto | 1999-11-30 |