Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6173165 | Receiver for RDS-TMC broadcast messages including storage device for storing control data under a code | Hans-Wilhelm Ruhl | 2001-01-09 |
| 5903824 | RDS-TMC broadcast receiver which substitutes phonetic characters for non-convertible characters prior to synthesizing speech | Hans-Wilhelm Ruhl | 1999-05-11 |