Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4612145 | Method for producing electret-containing devices | Harvey D. Keith, Heinz Von Seggern, James E. West | 1986-09-16 |
| 4512941 | Polarizing of piezoelectric material | Heinz Von Seggern | 1985-04-23 |
| 4241128 | Production of piezoelectric PVDF films | — | 1980-12-23 |