Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10457024 | Composite material with coating material | Christian Franz Callhoff, Ellen Keulen | 2019-10-29 |
| 9555442 | Composite material with coating material | Christian Franz Callhoff, Ellen Keulen | 2017-01-31 |