Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4492582 | Teaching and entertainment device | Richard S. Chang, Daniel J. Shoff | 1985-01-08 |
| 4403777 | Electronic game using phototransducer | Robert M. Del Principe, David A. Hostetler | 1983-09-13 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4492582 | Teaching and entertainment device | Richard S. Chang, Daniel J. Shoff | 1985-01-08 |
| 4403777 | Electronic game using phototransducer | Robert M. Del Principe, David A. Hostetler | 1983-09-13 |