Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4642079 | Transmission chain | Martinus H. Cuypers, Jacobus H. M. van Rooji | 1987-02-10 |
| 4398847 | Clamping device | Henricus P. Willemsen | 1983-08-16 |
| 4337057 | Transmission chain | Martinus H. Cuypers | 1982-06-29 |
| 4281483 | Method of curving supporting surfaces of driving belt elements | Rudolf J. G. A. van der Hoorn, Jozef W. M. Kummeling | 1981-08-04 |
| 4231313 | Stabilizing system on a semi-submersible crane vessel | Pieter S. Heerema, Henricus P. Willemsen | 1980-11-04 |
| 4220096 | Bogie | — | 1980-09-02 |
| 4213350 | Edge-active belt | Martinus H. Cuypers | 1980-07-22 |
| 4207828 | Stabilizing system for a crane vessel | Pieter S. Heerema, Henricus P. Willemsen | 1980-06-17 |