Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7428761 | Adjustable chair for medical and paramedical diagnosis and treatment, and adjustable ergonomic chair | Paul Arthur Engels, Johannes Henricus Maria de Kroon | 2008-09-30 |
| 7350863 | Height-adjustable work chair | Paul Arthur Engels, Joannes Henricus Maria de Kroon | 2008-04-01 |