Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8664525 | Germanium solar cell and method for the production thereof | Niels Posthuma, Jef Poortmans, Johan van der Heide | 2014-03-04 |
| 7964789 | Germanium solar cell and method for the production thereof | Niels Posthuma, Jef Poortmans | 2011-06-21 |
| 7960246 | Method for the manufacture of electronic devices on substrates and devices related thereto | Wim Geens, Jef Poortmans | 2011-06-14 |
| 7960645 | Germanium solar cell and method for the production thereof | Niels Posthuma, Jef Poortmans | 2011-06-14 |
| 6602760 | Method of producing a semiconductor layer on a substrate | Jef Poortmans, Renat Bilyalov | 2003-08-05 |