Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4331860 | Electrical resistance heating element | Hanno Roller, Karl-Heinz Nauerth | 1982-05-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4331860 | Electrical resistance heating element | Hanno Roller, Karl-Heinz Nauerth | 1982-05-25 |