Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6505154 | Method and device for comparing acoustic input signals fed into an input device with acoustic reference signals stored in a memory | Michael Mertens | 2003-01-07 |
| 4216709 | Chimney | — | 1980-08-12 |