Issued Patents 2002
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6435879 | Method and device for checking the correctness of answers to quiz questions over the media and in events, especially television and radio | — | 2002-08-20 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6435879 | Method and device for checking the correctness of answers to quiz questions over the media and in events, especially television and radio | — | 2002-08-20 |