Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6886501 | Apparatus and process for heating steam | Sjoerd Bosch, Johannes Didericus De Graaf | 2005-05-03 |
| 6840199 | Process for heating system | Johannes Didericus De Graaf | 2005-01-11 |