Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D416497 | Wristwatch with cross motif | — | 1999-11-16 |
| 5181251 | Amplifier unit | Roger Schultheiss | 1993-01-19 |
| 5134041 | Magnetic storage medium containing at least two different populations of magnetic particles each population having a separate mean coercive field strength | Matthias Zbinden | 1992-07-28 |
| 5129005 | Electrodynamic loudspeaker | Roger Schultheiss | 1992-07-07 |
| 4980921 | Magnetic system for dynamic loudspeaker | — | 1990-12-25 |
| 4849837 | Method of, and apparatus for, recording audio signals using recording signals free of audio frequencies | — | 1989-07-18 |
| 4720665 | Signal transducer | — | 1988-01-19 |
| 4567443 | Low-distortion audio amplifier circuit arrangement | — | 1986-01-28 |