Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870319 | Spark plug with creepage spark gap | Walter Benedikt, Werner Herden, Siegbert Schwab | 1989-09-26 |
| 4798991 | Surface-gap spark plug for internal combustion engines | Walter Benedikt, Gerhard Heess, Werner Herden, Karl-Hermann Friese, Helmut Reum +1 more | 1989-01-17 |
| 4746834 | Ignition plug for internal combustion engines | Adalbert Bauerle, Ludwig Barthelma, Walter Benedikt, Werner Herden, Walter Holl +3 more | 1988-05-24 |
| 4577610 | Ignition distributor system for an internal combustion engine | — | 1986-03-25 |
| 4475491 | Wide-gap ignition distributor | Werner Grunwald | 1984-10-09 |
| 4393282 | Electrode for ignition systems | Werner Grunwald, Ernst Zehender, Karl-Hermann Friese, Hans Neu, Kuno Kirner +1 more | 1983-07-12 |