Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4972171 | Method and apparatus for detecting illegal pitches | Mark Johnson | 1990-11-20 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4972171 | Method and apparatus for detecting illegal pitches | Mark Johnson | 1990-11-20 |