Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4654486 | Poor-scatter pot magnet system for magnetic-dynamic loudspeakers or acoustic transducers | — | 1987-03-31 |
| 4465906 | Low-leakage pot magnet system for moving-coil loudspeakers | Winfried Grimbach | 1984-08-14 |