Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4502196 | Method for manufacturing an insulated fuel injection nozzle device | Heinz Kupper | 1985-03-05 |
| 4434940 | Insulated fuel injection nozzle device and method for manufacturing same | Heinz Kupper | 1984-03-06 |
| 4274375 | Piston, especially for internal combustion engines | Heinz Kupper | 1981-06-23 |