Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5622525 | Method of polishing a surface of copper or an alloy comprising mainly copper | Jan Haisma, Dirk Kornelis Gerhardus De Boer, Waltherus Van Den Hoogenhof, Lambertus Postma | 1997-04-22 |
| 5547119 | Electrical machine and method of manufacturing the electrical machine | Jan Haisma, Evert M. H. Kamerbeek, Gijsbertus A. C. M. Spierings | 1996-08-20 |
| 5483115 | Electrical machine with directly bonded magnetic parts | Jan Haisma, Evert M. H. Kamerbeek, Gijsbertus A. C. M. Spierings | 1996-01-09 |
| 5441442 | Method of manufacturing a plate having a plane main surface, method of manufacturing a plate having parallel main surfaces, and device suitable for implementing said methods | Jan Haisma, Franciscus J. H. M. Van Der Kruis, Jakob Vijfvinkel | 1995-08-15 |
| 4801245 | Method of damping surges in recirpocating compressors | Robert Ehrich, Reidar Joergensen | 1989-01-31 |