Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4802092 | Electric probe used to activate correct and incorrect response areas in an instructional apparatus | — | 1989-01-31 |
| 4786896 | Input mechanism for word processor | — | 1988-11-22 |
| 4576579 | Instructional and testing apparatus with switch closure at two different depths | — | 1986-03-18 |
| 4561852 | Computer assisted teaching machine that uses two electroresistive sheets | — | 1985-12-31 |
| 4522599 | Computer assisted instructional and testing apparatus with switch closure at two different depths | — | 1985-06-11 |
| 4521199 | Computer assisted teaching machine that uses two sets of conductive strips | — | 1985-06-04 |
| 4453920 | Instructional apparatus with multiple types of feedback | — | 1984-06-12 |