Showing 1–8 of 8 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Joannes H. Beune | Wavin B.V. | 2 |
| 1 | Johan de Kok | Wavin B.V. | 2 |
| 1 | Jan Stoffelsma | Wavin B.V. | 2 |
| #4 | Bernhard Lodder | Wavin B.V. | 1 |
| #4 | Warner Jan de Putter | Wavin B.V. | 1 |
| #4 | Mannes Grendelman | Wavin B.V. | 1 |
| #4 | Ernst P. Cupido | Wavin B.V. | 1 |
| #4 | Ernst Ettema | Wavin B.V. | 1 |